# Tembrica

> Online toolkit: 762 tools across 52 categories. Most run right in the browser, with no installation.

Tembrica offers 762 online tools across 52 categories: audio & video editing, format conversion, image & PDF tools, device & hearing tests, accessibility helpers (dyslexia, color-blindness), health & wellness, games, calculators, electronics, 3D-printing, developer utilities, language tests, and more. Most tools run entirely in your browser via WebAssembly (FFmpeg WASM), the Web Audio API, WebGPU and other Web APIs; some heavy jobs run on our servers. Interface available in 10 languages: English (en), Russian (ru), Korean (ko), Arabic (ar), Indonesian (id), Portuguese (Brazil) (pt), German (de), Spanish (es), French (fr), Ukrainian (uk).

Canonical domain for international locales: https://tembrica.com. Russian version: https://timbrica.com/ru.

## API for agents

- [Tool catalogue](https://tembrica.com/v1/tools): what is callable — lanes, token price, contract version. Open, no key needed. 18 of the 762 tools are callable today; the rest exist only as browser pages.
- [OpenAPI contract](https://tembrica.com/v1/openapi.json): the full machine-readable request/response schema.
- [MCP server](https://tembrica.com/mcp): streamable HTTP (POST) — connects to any MCP client with one line of config.
- [API documentation](https://tembrica.com/docs/api): endpoints, error codes, contract version history.
- [API terms](https://tembrica.com/docs/api/terms): the key owner is responsible for every call made with it, and disclosing AI-generated material to end users is the integrator\'s obligation.

Calls are paid from a prepaid token balance. POST /v1/tools/{slug}/estimate prices a specific call, and each tool's default price is in the catalogue above. The price list is deliberately NOT duplicated here: a copy inside a file that is cached for a day and pasted into other contexts drifts from the real one silently. A human creates the key in profile settings and hands it to the agent. Some tools compute in the caller's own browser: those runs return a work order with a URL, and tokens are charged only once a result is delivered.


Two ways a call executes. The browser lane runs on the caller's own machine (your agent needs a browser): nominal price, generous limits. The server lane runs on ours: priced at cost, tight limits, and heavy jobs are queued and answer 202. Each tool declares its lanes in the catalogue; "lane":"auto" picks the cheapest available.

Feedback: POST https://tembrica.com/v1/feedback — key required, spends no tokens. Report a bug, a wrong result, or ask for a tool we do not have. Quote `run_id` when a specific call misbehaved and we can look up our own record of it. A human reads these.

## Recently added (20)

- [Eating window](https://tembrica.com/en/fasting-window): 2026-09-05 — Protocol, first meal and sleep — the window, the live countdown and the stages follow from those three.
- [Face retouching: shine, blemishes and skin tone](https://tembrica.com/en/face-retouch): 2026-09-05 — Face retouching that removes oily shine by the colour of the light, clears blemishes, evens skin tone and lifts under-eye circles. Pores stay.
- [My English Word List](https://tembrica.com/en/vocabulary-trainer): 2026-09-05 — Type a word — level, transcription and pronunciation fill themselves in. The card returns the day you start forgetting it, scheduled by FSRS.
- [Stamp Maker](https://tembrica.com/en/stamp-maker): 2026-09-05 — The stamp maker builds the seal from your details: pick the kind — corporate seal, notary, Ltd, office stamp, address stamp or your own shape — type the name and the numbers, and the layout arranges itself: the name around the ring, the registration line on the second ring, the short name in the middle. Out come a transparent PNG for documents, an SVG or PDF with the text as outlines for the stamp maker's workshop, and a realistic inked impression for scans.
- [Caller check](https://tembrica.com/en/caller-check): 2026-09-04 — Family safe word, the call-back rule and voice comparison with a saved sample. Disproves a "relative in trouble" call; never confirms identity.
- [Handwriting from typed text](https://tembrica.com/en/text-to-handwriting): 2026-09-04 — Turns typed text into a page written by hand: handwriting styles, ruled paper, transparent PNG and PDF. Also writes by hand into an existing PDF form.
- [Photo cropping without quality loss](https://tembrica.com/en/photo-crop): 2026-09-03 — Crop a photo by frame, ratio or exact pixels. JPEG is cut without re-encoding. Also: circle crop, print size in cm, tiles and a poster across A4.
- [Digital Will](https://tembrica.com/en/digital-will): 2026-09-03 — What Google, Apple and password managers already offer, what to write down, and how to split the key so nobody opens the envelope alone.
- [Renovation cost estimate](https://tembrica.com/en/repair-estimate): 2026-09-03 — Enter your rooms — wall, floor, ceiling areas and the skirting run are worked out for you. Tick the jobs, put in your own prices or the ones from the quote you were sent, and see the total next to the standard labour hours.
- [Renovation Work Norms](https://tembrica.com/en/repair-norms): 2026-09-03 — Pick a job and see what it includes under the Russian state construction norms, how many man-hours it should take and how much material your volume needs.
- [Read a Plate From Video](https://tembrica.com/en/forensic-enhancer): 2026-09-02 — Still frame from dashcam or CCTV video: sharpest frame, frame stacking, motion deblur, denoise, plate reading. In the browser, no invented pixels.
- [Baby Sleep Schedule](https://tembrica.com/en/baby-sleep-schedule): 2026-09-02 — Wake windows by age plus a live daily plan: nap and bedtime targets recalculate from when your baby actually woke, not from an ideal timetable.
- [Hospital Bag Checklist](https://tembrica.com/en/hospital-bag): 2026-09-02 — A tickable hospital bag list split by bag: documents, labour, postnatal, baby, going home. Adapts to a caesarean, the season and a birth partner.
- [Kegel Exercises](https://tembrica.com/en/kegel-trainer): 2026-09-02 — Pelvic floor trainer with a squeeze timer, breathing cues, a week-by-week programme, technique checks and a separate mode for a tight pelvic floor.
- [Vaccination Calendar](https://tembrica.com/en/vaccination-calendar): 2026-09-02 — A personal immunisation schedule from your child’s date of birth: exact dates, done marks, overdue highlighting and export to your phone calendar.
- [Power Outage Planner](https://tembrica.com/en/blackout-planner): 2026-09-02 — How long the fridge, the freezer, the heat, the power bank and the water last in your flat, and what is dangerous to heat with.
- [Birth Poster](https://tembrica.com/en/birth-poster): 2026-09-02 — A birth details poster: name, date, weight, height and photo. Ready A4 layout, print and a 300 dpi file, with a life-size footprint frame.
- [Small-craft skipper practice test](https://tembrica.com/en/gims-test): 2026-09-02 — The official EMERCOM question list — 1,221 questions with answers by vessel type and navigation area, plus a ticket in the order No. 90 format.
- [Sea distance between ports](https://tembrica.com/en/sea-route): 2026-09-02 — A route over water between any two ports: nautical miles, passage time, fuel. Computed in your browser, with canal options and no limits.
- [Tide Times](https://tembrica.com/en/tides): 2026-09-02 — High and low water times for any coastal place, a tide curve two weeks ahead and under-keel clearance. Computed in your browser, works offline.

## Audio (51)

- [8D Audio](https://tembrica.com/en/3d-audio): Load a song and hear it circle your head.
- [ACX Audiobook Mastering](https://tembrica.com/en/acx-mastering): ACX audiobook mastering tool — auto-normalize RMS, limit peaks, reduce noise, export 192 kbps CBR MP3 for Audible.
- [Add Silence](https://tembrica.com/en/add-silence): Add silence to the beginning, end, or anywhere in your audio file — instant preview and export.
- [AI Music Cleaner](https://tembrica.com/en/ai-music-cleaner): Add low-mid warmth and depth to heavily-compressed AI music. Apollo neural model preserves your highs while restoring the low-mid range. In your browser.
- [Audio Censor](https://tembrica.com/en/audio-censor): Audio censor tool with 8 replacement types — beep, silence, reverse, pitch shift, noise and your own sound. Waveform editor with real-time preview.
- [Audio Compressor](https://tembrica.com/en/audio-compressor): Drop any audio file and we will detect the format automatically. Optimal compression settings are applied based on the detected codec.
- [Audio Degrader](https://tembrica.com/en/audio-degrader): Audio degrader with 12 degradation presets and 7 manual controls. Bitcrusher, noise, distortion, wow & flutter, filters — real-time preview with A/B comparison.
- [Audio Enhancer](https://tembrica.com/en/audio-enhancer): Improve clarity, boost bass and treble, normalize volume, and reduce noise. Smart presets for speech and music.
- [Audio Looper](https://tembrica.com/en/audio-looper): The most powerful audio looper online — repeat songs with crossfade, gap control, A/B section loop, fade effects, and target duration mode. Browser-based.
- [Audio Mixer](https://tembrica.com/en/audio-mixer): Mix multiple audio tracks with per-track volume, pan, EQ, reverb, and compressor. Export your mix in any format.
- [Audio Player Online](https://tembrica.com/en/audio-player): A player for people who listen closely: it plays the ordinary formats and the ones the browser does not know, reads CUE albums, shapes tone with 31 bands and matches loudness between recordings.
- [Audio Restoration](https://tembrica.com/en/audio-restoration): Bring old recordings back to life. Diagnose noise and clicks, apply per-source presets, repair the spectrogram, target broadcast loudness.
- [Audiobook Consistency Checker](https://tembrica.com/en/audiobook-checker): Upload all audiobook chapters to check ACX compliance and consistency
- [Background Music](https://tembrica.com/en/background-music): Lay background music under a voice-over or narration online. Auto-ducking keeps speech clear, with looping and fades. Export MP3 or WAV.
- [Channel Converter](https://tembrica.com/en/channel-converter): Upmix stereo to 5.1 or 7.1 surround, or downmix a surround file back to stereo or mono — in your browser.
- [Audio Chapter Splitter](https://tembrica.com/en/chapter-splitter): Upload an audiobook, podcast, or lecture — split it into named chapters and export as a ZIP archive.
- [Convert Audio](https://tembrica.com/en/convert): Convert audio between MP3, WAV, FLAC, OGG, AAC and 35+ other formats. Batch up to 500 files — adjustable bitrate, sample rate, and quality.
- [Audio Denoiser](https://tembrica.com/en/denoise): Remove background noise from voice recordings, podcasts, and music. Smart profiles for different noise types.
- [8-Bit Chiptune Synthesizer](https://tembrica.com/en/eight-bit-converter): Full song or solo melody to authentic 8-bit chiptune with real NES waveforms. 8 presets.
- [Equalizer](https://tembrica.com/en/equalizer): Professional 10-band equalizer with real-time preview, spectrum analyzer, and 14 presets. Adjust bass, treble, mids, apply high/low-pass filters — all directly in your browser.
- [Extract Audio from Video](https://tembrica.com/en/extract-audio): Extract the audio track from any video file — MP4, AVI, MKV, MOV, WebM and more. Quick lossless extraction or convert to MP3, WAV, FLAC. All processing in your browser.
- [Jingle Studio](https://tembrica.com/en/jingle-maker): Type a line — the studio builds the whole thing: announcer voice, music bed, effects, mixing and broadcast loudness.
- [Audio Joiner](https://tembrica.com/en/join): Combine multiple audio files into a single track with per-clip editing, smooth crossfades, and loudness normalization — all in your browser.
- [MIDI to MP3/WAV](https://tembrica.com/en/midi): Play MIDI files in your browser with piano roll visualization. Adjust tempo, mute tracks, export to MP3.
- [MIDI Humanizer](https://tembrica.com/en/midi-humanizer): Adds ensemble timing, phrasing and CC1/CC11 inside held notes to a MIDI score. Export MIDI and WAV, right in the browser.
- [Mono to Stereo](https://tembrica.com/en/mono-to-stereo): Convert mono audio files to stereo — duplicate, pan, or create pseudo-stereo effect. Runs in your browser.
- [Multi-Track Recorder](https://tembrica.com/en/multi-track): Record from multiple microphones simultaneously in separate tracks.
- [AI Music Generator](https://tembrica.com/en/music-generator): Generate instrumental music with a neural network: backgrounds for videos, streams, podcasts and games. Task-based styles, 2 takes per run, MP3.
- [Music Mastering](https://tembrica.com/en/music-mastering): Online music mastering — streaming loudness, true-peak limiting, reference matching, WAV/MP3 download.
- [Change Pitch](https://tembrica.com/en/pitch): A powerful browser-based pitch shifter with real-time preview, automatic key detection, BPM analysis, and precise semitone/cent control. Transpose any song to match your vocal range or instrument key.
- [Podcast Insert](https://tembrica.com/en/podcast-insert): Insert audio segments — ads, intros, outros, jingles — at any point in your podcast episode. Visual waveform editor with precise placement.
- [Audio Profanity Remover](https://tembrica.com/en/profanity-remover): AI speech recognition finds swear words and mutes exactly those words by timecode
- [Recording Studio](https://tembrica.com/en/recording-studio): Upload a backing track and record your voice over it.
- [Word removal from a song](https://tembrica.com/en/remove-word-from-song): Click a syllable on the vocal lane to select it.
- [Audio Repair](https://tembrica.com/en/repair-audio): Fix corrupted or broken audio files — repair headers, timestamps, and codec-level damage.
- [Reverb & Echo](https://tembrica.com/en/reverb-echo): Add reverb, echo, or both to your audio. Apply to the entire file or just a selected region. Real-time preview, 12 presets, in your browser.
- [Reverse Audio](https://tembrica.com/en/reverse): Reverse any audio file to play it backwards — partial reverse, palindrome mode, fade effects, speed control, and mic recording. The most powerful audio reverser online.
- [Ringtone Maker](https://tembrica.com/en/ringtone): Select a fragment up to 40 seconds for your ringtone
- [Sound Effect Generator](https://tembrica.com/en/sfx-generator): Describe a sound in words and the AI creates the SFX, ambience or UI sound. Two engines, seamless looping, adjustable duration and accuracy.
- [Silence Remover](https://tembrica.com/en/silence-remover): Automatically detect and remove silent parts from audio. Adjustable threshold, waveform preview, and export.
- [AI Song Generator](https://tembrica.com/en/song-generator): Song generator from your lyrics: pick a style and the AI composes music and sings your words — two variants per run. Online, in your browser.
- [Speech Restorer](https://tembrica.com/en/speech-restorer): AI-powered speech restoration that makes unintelligible audio listenable again — fixes noise, muffling, reverb, and bandwidth loss.
- [Audio Speed Changer](https://tembrica.com/en/speed): Speed up or slow down audio from 0.05x to 10x without changing pitch. Perfect for practice and transcription.
- [Stereo to Mono](https://tembrica.com/en/stereo-to-mono): Convert stereo audio to mono, extract left or right channel, swap L/R, or split stereo into two separate files. Browser tool.
- [5.1 Surround Disc Image for Home Theatre](https://tembrica.com/en/surround-disc): Build surround audio into a DVD-Video disc with chapters, AC-3, multichannel FLAC, a DTS track or an ISO image. Online, in your browser.
- [Time-Stretch to Target BPM](https://tembrica.com/en/time-stretch): Change tempo without changing pitch — no chipmunk voice
- [Trim Audio](https://tembrica.com/en/trim): Provide a start time and an optional end time to cut a fragment.
- [Voice Compressor](https://tembrica.com/en/voice-compressor): A studio-grade dynamics compressor that levels uneven loudness, with a gain-reduction meter, level-matched A/B and LUFS targets — all in your browser.
- [Song in Your Own Voice](https://tembrica.com/en/voice-cover): Record your voice and sing any song with it. The voice is kept in your account; the AI service holds it for a limited time.
- [Voice Enhancer](https://tembrica.com/en/voice-enhancer): AI voice and vocal enhancement: noise reduction, de-reverb, a gentle vocal mode, an enhancement strength slider, and LUFS normalization.
- [Audio Volume Changer](https://tembrica.com/en/volume): Increase or decrease volume of MP3, WAV, FLAC and other formats online.

## Voice & Speech (18)

- [Audio to Text](https://tembrica.com/en/audio-to-text): Upload a recording and get the text in paragraphs, with speaker labels and timecodes. Edit on the page, download DOCX, PDF or subtitles.
- [Audio Translator](https://tembrica.com/en/audio-translator): Translate an audio recording into another language and hear it: podcasts, interviews, lectures, voice notes. Audio, transcript and subtitles out.
- [Dialogue analysis and conversation protocol](https://tembrica.com/en/dialogue-analysis): Paste a conversation transcript — AI builds the protocol: participants, decisions, tasks, agreements. Every item carries a verbatim quote.
- [Online Voice Recorder](https://tembrica.com/en/dictaphone): Record from microphone or system audio directly in your browser. No installation, no signup — just press record.
- [Drum Separator](https://tembrica.com/en/drum-separator): Break a drum track into kick, snare, toms and cymbals with hi-hat using a neural network right in your browser. Each part as a file — or into the mixer.
- [Vocal Harmony Generator](https://tembrica.com/en/harmony-generator): Add natural harmony voices to any vocal in your browser — diatonic thirds, fifths, octaves and choir that keep your own voice.
- [Karaoke Maker](https://tembrica.com/en/karaoke): Create karaoke versions of any song. Remove vocals, change key and tempo — sing your way.
- [Lyrics Transcription from Audio](https://tembrica.com/en/lyrics-transcription): A tool that recognises the lyrics of a song from a recording: it separates the vocals from the music, picks a model for the language and returns the words line by line with timestamps.
- [Megaphone Effect](https://tembrica.com/en/megaphone): Transform any voice or audio into a megaphone, bullhorn or walkie-talkie sound.
- [Re-Dub](https://tembrica.com/en/redub): Upload audio or video, get an editable transcript, and re-voice it — change the speaker, switch voices line by line, or re-dub just one character.
- [Speech to Text](https://tembrica.com/en/speech-to-text): Speak into your microphone and watch text appear in real time. Voice commands, auto-punctuation, 34 languages.
- [Text to Speech](https://tembrica.com/en/text-to-speech): Convert text to natural speech with neural AI voices in 30+ languages. Download as MP3.
- [Record Vocals](https://tembrica.com/en/vocal): Record vocal takes, comp the clips on a timeline and shape your voice with reverb, EQ and a compressor.
- [Vocal Range Finder](https://tembrica.com/en/vocal-range): Sing into your microphone and discover your vocal range and voice type. Runs in your browser.
- [Vocal Remover](https://tembrica.com/en/vocal-remover): Separate vocals from music using AI. Get instrumental and acapella tracks for karaoke and remixes.
- [Voice Changer](https://tembrica.com/en/voice-changer): Transform your voice with 43 effects — robot, deep, chipmunk, echo and more. Record or upload audio.
- [Change the voice](https://tembrica.com/en/voice-gender): Replace the voice in a recording: make it female or male, take a voice from the catalogue — or sing someone else’s song in your own timbre.
- [Voice Translator](https://tembrica.com/en/voice-translator): Translate speech in real time between 50+ languages.

## Video (52)

- [Add Music to Video](https://tembrica.com/en/add-music-to-video): Add background music, voiceover, or sound effects to any video. Multi-track timeline with live preview.
- [Animated Avatar Maker](https://tembrica.com/en/animated-avatar): Create looping animated profile pictures, boomerangs, and stickers from any photo or video — with platform presets, shape masks, transparent backgrounds, and five export formats.
- [Create Video from Audio](https://tembrica.com/en/audio-to-video): Upload music, a podcast, or voice recording — get a ready-made video with sound visualization, backgrounds, and text.
- [Audio Visualizer](https://tembrica.com/en/audio-visualizer): Watch mesmerizing shader-based visuals that react to your voice or music in real time.
- [Subtitles & Transcript](https://tembrica.com/en/auto-captions): Turns speech in a video into subtitles (SRT/VTT), a copyable transcript, and an MP4 with captions.
- [Video doppelganger](https://tembrica.com/en/clone-effect): Film two takes from one spot and end up in frame twice. Each take keeps its own sound, music on top. In your browser.
- [Voice Boost for Video](https://tembrica.com/en/dialogue-enhancer): Speech too quiet and music too loud? The player lifts voices and holds the background down while you watch — and saves the fixed video.
- [Digital Signage](https://tembrica.com/en/digital-signage): Digital signage: fullscreen slideshows for TVs and displays. Transitions, music, widgets. Export video for offline.
- [Video Enhancer](https://tembrica.com/en/enhance-video): Improve video quality with presets or fine-tune every parameter manually.
- [Face Maker](https://tembrica.com/en/face-maker): Drag the sliders to morph the head shape, set the expression and pose, then download a PNG — all in your browser.
- [Read a Plate From Video](https://tembrica.com/en/forensic-enhancer): Still frame from dashcam or CCTV video: sharpest frame, frame stacking, motion deblur, denoise, plate reading. In the browser, no invented pixels.
- [Music Video Maker](https://tembrica.com/en/music-video-maker): Upload a song and a few short clips — the tool mutes the clip audio, keeps your music, and cuts the montage to the beat.
- [Remove Audio from Video](https://tembrica.com/en/mute-video): Remove audio from video instantly. Lossless stream copy — no quality loss. Download muted video and extracted audio separately.
- [Video Profanity Remover](https://tembrica.com/en/profanity-remover-video): AI speech recognition finds swear words and mutes exactly those words by timecode
- [Reels Maker](https://tembrica.com/en/reels-maker): Convert any video to vertical format for TikTok, Instagram Reels, and YouTube Shorts.
- [Object removal from video](https://tembrica.com/en/remove-object-from-video): Take out a stray person or thing — the background behind it is rebuilt.
- [Remove Text from Video](https://tembrica.com/en/remove-text-from-video): Erase burned-in subtitles, watermarks and logos by rebuilding the background behind them — not just blurring.
- [Video Repair](https://tembrica.com/en/repair-video): Fix corrupted or broken video files — repair containers, codecs, timestamps, and recover damaged footage.
- [Reverse Video](https://tembrica.com/en/reverse-video): Reverse any video with boomerang mode, speed control, trim, and GIF export. Browser-based.
- [Screen Recorder](https://tembrica.com/en/screen-recorder): Record your screen, browser tab, or window directly in the browser.
- [Slideshow Maker](https://tembrica.com/en/slideshow-maker): Combine photos and video clips with music — transitions, Ken Burns motion, export to MP4 up to 4K, slides or PDF.
- [Split Screen Video](https://tembrica.com/en/split-screen): Combine 2-4 videos into one screen. Side by side, top/bottom, PiP, grid layouts. Presets for TikTok, Instagram, YouTube.
- [Storyboard Maker](https://tembrica.com/en/storyboard-maker): Draw a shot or pull frames from a video, fill in camera moves and timing, then export a print-ready PDF, an animatic or a shot list.
- [Subtitle Merger](https://tembrica.com/en/subtitle-merger): Merge two subtitle files into one bilingual file.
- [Subtitle Translator](https://tembrica.com/en/subtitle-translator): Translate subtitle files to any language.
- [Talking Avatar](https://tembrica.com/en/talking-avatar): Type a script, pick a voice, and a 3D avatar speaks it with lip-sync — then download the clip as a video. In your browser.
- [Video Audio Editor](https://tembrica.com/en/video-audio): Sound processing and track operations in one place: 10-band equalizer, noise reduction, compressor, platform loudness targets, track replacement and audio extraction. The picture stays untouched.
- [Video Background Remover](https://tembrica.com/en/video-bg-remover): Cut a subject out of a video and keep it on a real alpha channel or on a new background.
- [Video Blur](https://tembrica.com/en/video-blur): Blur faces, pixelate areas, or censor sensitive content in your video — with AI face detection, multiple blur types, and audio censoring.
- [Video Colorizer](https://tembrica.com/en/video-colorize): Turn black-and-white video into color with AI, right in your browser.
- [Video Compressor](https://tembrica.com/en/video-compressor): Compress video for WhatsApp, Discord, Email or set exact target size. 16 platform presets.
- [Video Converter](https://tembrica.com/en/video-converter): Convert video between MP4, MKV, MOV, AVI, WebM, WMV, FLV, TS and 3GP in your browser. A container swap copies the streams instead of re-encoding.
- [Video Crop & Resize](https://tembrica.com/en/video-crop): Crop, resize, and change video aspect ratio online. Vertical, square, circle crops with blur background. Browser-based, no watermark.
- [Video Dubbing](https://tembrica.com/en/video-dubbing): Dub video into another language: AI speech translation, a voice cloned from the video or studio AI voices, music kept. Video, track & SRT export.
- [Video Filter](https://tembrica.com/en/video-filter): Online video filter tool. Turn video black & white, add sepia, vintage or VHS effects with a live preview. No watermark, no signup.
- [Video Flip & Mirror](https://tembrica.com/en/video-flip): Flip, mirror, and rotate videos online. Horizontal mirror, vertical flip, 90/180/270° rotation. Instant preview, no watermark.
- [Increase Video FPS](https://tembrica.com/en/video-fps): Make video smoother via frame interpolation. FFmpeg or AI RIFE.
- [Video Frames](https://tembrica.com/en/video-frames): Extract all frames from video or assemble images into video. 9 extraction modes, WebP support, ZIP download, contact sheet.
- [Video Location Finder](https://tembrica.com/en/video-location): Extract GPS & metadata from videos. View filming location on map, extract frames.
- [Video Looper](https://tembrica.com/en/video-loop): Repeat a clip N times or loop it to an exact length — lossless and instant, right in your browser.
- [Merge Videos](https://tembrica.com/en/video-merge): Merge multiple videos into one with smooth transitions, per-clip editing, and lossless mode. In browser.
- [Video Metadata Editor](https://tembrica.com/en/video-metadata): View, edit or remove title, GPS location, creation date and device info from your videos
- [Video Overlay](https://tembrica.com/en/video-overlay): Put one video on top of another: picture-in-picture, chroma key, AI person cutout and blend effects — right in your browser.
- [Universal Video Player](https://tembrica.com/en/video-player): Play almost any video format in your browser — MKV, AVI, MOV, WMV, FLV, TS, HEVC and more, with subtitles, audio tracks and chapters.
- [Video Speed Editor](https://tembrica.com/en/video-speed): Change video speed from 0.1x to 16x. Apply speed ramps by segments with pitch preservation — all in your browser.
- [Video to VR](https://tembrica.com/en/video-to-vr): Convert any video to side-by-side format for smartphone VR headsets. Barrel distortion correction and VR metadata included.
- [Trim Video](https://tembrica.com/en/video-trim): Trim and cut video files online. Visual timeline with waveform and thumbnail preview. Export to MP4, WebM. Browser-based.
- [AI Video Upscaler](https://tembrica.com/en/video-upscaler): MP4, MOV, AVI, MKV, WebM — up to 1 GB
- [Video Volume & Loudness](https://tembrica.com/en/video-volume): Boost or reduce video volume, or normalize to YouTube/podcast/broadcast loudness. Measures real LUFS and true peak, applies exact gain, prevents clipping — video stays untouched.
- [Video Wall](https://tembrica.com/en/video-wall): Split video or image into tiles for multi-monitor video wall display.
- [Text and watermark on video](https://tembrica.com/en/video-watermark): Add text, logos, images, and tiling patterns to protect or brand your videos — with multiple layers, animations, timing control, and presets.
- [Webcam Recorder](https://tembrica.com/en/webcam-recorder): Record yourself on your webcam and microphone, then download the video.

## Device Testing (35)

- [Battery Checker](https://tembrica.com/en/battery-checker): Free online battery checker.
- [Bluetooth Audio Test](https://tembrica.com/en/bluetooth-test): Test any Bluetooth audio device: headphones, speakers, earbuds, car audio. Measure latency, check speaker channels, test mic quality.
- [Camera Test](https://tembrica.com/en/camera-test): Test your webcam for resolution, FPS, sharpness, noise, lighting, and color accuracy.
- [Click Speed Test](https://tembrica.com/en/click-speed-test): Measure your clicks per second with multiple modes and timers
- [Codec Support Test](https://tembrica.com/en/codec-support-test): Check which audio and video codecs your browser supports — H.264, H.265, AV1, VP9, Opus, AAC, FLAC. Free, in your browser.
- [CPU Benchmark](https://tembrica.com/en/cpu-benchmark): Test your processor speed with single-thread and multi-thread benchmarks
- [Dead Pixel Test](https://tembrica.com/en/dead-pixel-test): Check your screen for dead, stuck, and hot pixels with 21 test patterns and built-in repair tool
- [Gamepad Test](https://tembrica.com/en/gamepad-test): Test your controller buttons, sticks, triggers and vibration online
- [GPU Benchmark](https://tembrica.com/en/gpu-benchmark): WebGL-based GPU benchmark that tests particles, 3D geometry, and shaders. Produces a score from 0 to 10,000. Includes stress test mode.
- [Gyroscope Test](https://tembrica.com/en/gyroscope-test): Test your phone's gyroscope, accelerometer, and motion sensors. 3D visualization, spirit level, graphs, accuracy test, CSV export.
- [HDR Display Test](https://tembrica.com/en/hdr-test): HDR detection, visual tests, diagnostics & scoring
- [Keyboard Test](https://tembrica.com/en/keyboard-test): Test every key, detect ghosting, measure latency and typing speed
- [Mic Noise Test](https://tembrica.com/en/mic-noise-test): Test your microphone for noise, identify the problem type, and get step-by-step fix instructions.
- [Microphone Test](https://tembrica.com/en/mic-test): Check if your microphone works — test volume, sensitivity, noise floor, and audio quality in the browser.
- [Monitor Color Test](https://tembrica.com/en/monitor-color-test): Check color accuracy, gamma, contrast, and gradients — all in the browser
- [Mouse Polling Rate Test](https://tembrica.com/en/mouse-polling-rate-test): Move the cursor over the test area — the polling rate appears within a second.
- [Mouse Test](https://tembrica.com/en/mouse-test): Test every mouse button, scroll wheel, and drag tracking
- [Phone Benchmark](https://tembrica.com/en/phone-benchmark): Get a 0–100 score for your phone in 10 seconds — CPU, GPU, RAM, display, network, and health.
- [Phone Check](https://tembrica.com/en/phone-check): Screen, touch, cameras, microphone, speakers, vibration, sensors and battery — one at a time, with a report at the end
- [Phone Display Test](https://tembrica.com/en/phone-display-test): Check your phone screen for dead pixels, touch issues, backlight bleed, burn-in, and color accuracy.
- [Phone Keyboard Test](https://tembrica.com/en/phone-keyboard-test): Type a phrase and we verify the output — catching autocorrect, missing letters and lag
- [Printer Test](https://tembrica.com/en/printer-test): Check your printer in seconds with Quick Test or run detailed diagnostics with Professional mode. Color bars, nozzle check, grayscale, text sharpness, and more.
- [Refresh Rate Test](https://tembrica.com/en/refresh-rate): Measure your monitor refresh rate with precision frame timing. Detect Hz, analyze jitter, explore display capabilities, and test motion smoothness — all in your browser.
- [Screen Burn-In Test](https://tembrica.com/en/screen-burnin-test): Test your OLED or LCD screen for burn-in and image retention with fullscreen solid colors and burn-in pattern overlays.
- [Speaker Cleaner](https://tembrica.com/en/speaker-cleaner): Water eject at 165 Hz, a dust sweep, and a microphone check that tells you whether the sound actually changed.
- [Speaker & Headphone Test](https://tembrica.com/en/speaker-test): Test your speakers, headphones, or surround system right in the browser.
- [Stylus Test](https://tembrica.com/en/stylus-test): Pressure, pressure steps, tilt, twist, pen buttons, report rate and latency — with the cause explained, not just numbers
- [Subwoofer Test](https://tembrica.com/en/subwoofer-test): Test your subwoofer with tone generator, frequency sweeps, bass drops, diagnostics, and room mode calculator.
- [Touchscreen Test](https://tembrica.com/en/touchscreen-test): Test multitouch, dead zones, ghost touches, latency and pressure sensitivity on any touchscreen device
- [Typing Speed Test](https://tembrica.com/en/typing-speed-test): Measure your typing speed in words per minute with real-time accuracy tracking
- [USB Drive Tester](https://tembrica.com/en/usb-drive-tester): Detect fake USB drives and verify real capacity — like h2testw, but in your browser.
- [Vibration Test](https://tembrica.com/en/vibration-test): Test your device vibration motor with patterns, diagnostics, and a custom builder.
- [VR Compatibility Test](https://tembrica.com/en/vr-compatibility-test): Check WebXR support, GPU, CPU, RAM, sensors and bandwidth — then see which VR headsets match your hardware
- [VR Headset Test](https://tembrica.com/en/vr-headset-test): WebXR diagnostic suite for FOV, tracking, refresh rate, spatial audio and display dead pixels — runs inside your headset browser
- [VR Readiness Test](https://tembrica.com/en/vr-readiness-test): Check stereo vision, motion sickness risk, IPD and find the VR headset that fits you before you buy

## Analysis (18)

- [Video Analyzer](https://tembrica.com/en/analyze): Inspect any video file in your browser: codec, resolution, real bitrate, HDR, color, audio tracks and platform-readiness checks. Free.
- [Audio Comparator](https://tembrica.com/en/audio-comparator): Compare two audio files side-by-side with objective metrics — LUFS, spectrum, dynamic range, ABX blind test, sample-level diff.
- [Audio Forensics](https://tembrica.com/en/audio-forensics): Analyze audio for signs of editing, splicing, or AI generation.
- [Audio Inspector](https://tembrica.com/en/audio-inspector): Inspect audio files for true quality — detect upsampled or re-encoded tracks by analyzing the spectrum.
- [Audio Metadata Editor](https://tembrica.com/en/audio-metadata): View, edit or strip ID3 tags, cover art and comments via WebAssembly
- [Audio Microscope](https://tembrica.com/en/audio-microscope): Slow any sound down to 500x without changing pitch and inspect it under a live spectrogram with note and frequency readout.
- [Audio Splice Detector](https://tembrica.com/en/audio-splice-detector): Find splices, cuts and edits in audio recordings using six forensic detectors with millisecond precision.
- [Audio to Notes](https://tembrica.com/en/audio-to-notes): Transcribe any audio recording into notes, MIDI, and sheet music using AI.
- [Audio Watermark](https://tembrica.com/en/audio-watermark): Embed an invisible watermark in your audio to prove ownership.
- [BPM & Key Finder](https://tembrica.com/en/bpm-key-finder): Upload a song to detect BPM, musical key, and Camelot notation. Includes tap-tempo for manual detection.
- [Chord Finder for Songs](https://tembrica.com/en/chord-finder): Upload a recording and get its chords with fingering diagrams, key and tempo. Capo, transpose, slow-down and loop for practice.
- [Ear Trainer](https://tembrica.com/en/ear-trainer): Hearing which frequency is the problem is a skill built by repetition. Everything you need for that is here.
- [Guitar Pro to MIDI](https://tembrica.com/en/guitar-pro-to-midi): Convert Guitar Pro (GP3-GP8, GPX) and MusicXML tabs to MIDI in your browser. Pick tracks, preview, and download.
- [Instruments in a song](https://tembrica.com/en/instrument-identifier): Upload a track and get the list of instruments plus a map of where each one enters.
- [Mix Reference Analyzer](https://tembrica.com/en/mix-analyzer): Compare your mix to a reference track: LUFS, spectrum, dynamics, stereo and precise recommendations.
- [Music Genre Detector](https://tembrica.com/en/music-genre-detector): Upload an audio file to identify its genre, mood, dominant instruments, BPM and musical key.
- [Orchestration check](https://tembrica.com/en/orchestration-check): Reads a MusicXML or MIDI score and shows what the orchestra cannot play: notes out of range, no room to breathe, impossible harp chords.
- [Sheet Music to MIDI](https://tembrica.com/en/sheet-music-to-midi): Scan any score photo or PDF and hear the notes back.

## Generation (17)

- [Alarm Sound Generator](https://tembrica.com/en/alarm-sound-generator): Generate alarm sounds, notification tones, and sirens. 33 presets, custom synthesizer, multiple export formats.
- [Audio Scene](https://tembrica.com/en/audio-scene): Upload a recording and hear it in 60 acoustic spaces — from a cathedral to a phone line. Shape the tail, compare against the original, and save the result.
- [Binaural Beats Generator](https://tembrica.com/en/binaural-beats): Use headphones for the binaural effect to work.
- [Bird Repeller](https://tembrica.com/en/bird-repeller): Generate deterrent sounds in the 1–5 kHz bird hearing range — 8 synthesized modes, species targeting, anti-habituation timer.
- [Cockroach Repellent](https://tembrica.com/en/cockroach-repellent): Select a frequency mode and press START. Place the device in the room where cockroaches are active.
- [Dog Repellent](https://tembrica.com/en/dog-repellent): Press the button to activate the repellent. The sound starts immediately.
- [Dog Whistle](https://tembrica.com/en/dog-whistle): Choose a preset or adjust frequency manually. Press Play to start.
- [Doorbell Sound Generator](https://tembrica.com/en/doorbell-sound-generator): Generate doorbell sounds, chimes, and melodies. 35 presets, custom synthesizer, melody composer, multiple export formats.
- [DTMF Generator](https://tembrica.com/en/dtmf-generator): Generate and decode telephone touch-tones with ITU-T Q.23 precision — keypad, sequence player, microphone decoder, multi-region call-progress tones, WAV/MP3 export.
- [Isochronic Tones](https://tembrica.com/en/isochronic-tones): Choose a preset or customize your session in Expert mode. No headphones required — works through any speaker.
- [Loud Sound Generator](https://tembrica.com/en/loud-sound-generator): Play loud sounds instantly — alarms, sirens, horns, horror effects. Boost your audio files up to 400%.
- [Morse Code Generator](https://tembrica.com/en/morse-generator): Convert text to Morse code with audio playback. Adjust speed and tone, download as MP3 or WAV.
- [Rodent Repellent](https://tembrica.com/en/rodent-repellent): Select a target pest mode and press START. Place the device in the room with rodent activity.
- [Silence Generator](https://tembrica.com/en/silence-generator): Download silent ringtones for iPhone & Android in one click.
- [Tone Generator](https://tembrica.com/en/tone-generator): Generate precise audio tones, sweep frequencies, mix oscillators, play DTMF phone tones, export WAV. Web Audio API.
- [Ultrasonic Generator](https://tembrica.com/en/ultrasonic): Generate ultrasonic frequencies beyond human hearing. Up to 48 kHz with 96 kHz sample rate. Real-time spectrum analyzer.
- [White Noise Generator](https://tembrica.com/en/white-noise): Mix 45 ambient sounds for sleep, focus, and relaxation. Set a sleep timer, customize your mix, and export to any format.

## Games (33)

- [2048](https://tembrica.com/en/2048-game): Slide tiles with arrow keys or swipe. Merge matching numbers to reach 2048!
- [Air Hockey Game](https://tembrica.com/en/air-hockey-game): Free air hockey game with single player, local and online multiplayer modes, power-ups, and 4 table themes.
- [Bouncy Paws](https://tembrica.com/en/bouncy-paws): A fun jumping game for kids — help a cute cat bounce from platform to platform and reach for the sky.
- [Games for Cats](https://tembrica.com/en/cat-games): 10 interactive browser games designed for cats to play on tablets, phones, and screens.
- [Checkers](https://tembrica.com/en/checkers): Hint
- [Checkers Rules](https://tembrica.com/en/checkers-rules): Rules of Russian draughts: how men and kings move, why capturing is compulsory, how the five variants differ. With diagrams and hands-on lessons.
- [Chess](https://tembrica.com/en/chess): Hint
- [Cities Game](https://tembrica.com/en/cities-game): Name a city; the next must begin with its last letter.
- [Dice Roller](https://tembrica.com/en/dice-roller): 3D dice you can watch tumble: d4–d100, advantage and disadvantage, 4d6kh3, exploding dice, odds before you roll and face statistics.
- [Dino Runner](https://tembrica.com/en/dino-runner): Play the classic dinosaur runner game — jump over obstacles and set your high score
- [Egg Catcher](https://tembrica.com/en/egg-catcher): Browser remake of a Soviet LCD handheld. Catch eggs with the basket — don't miss any. Game A/B, 2 themes, personal records. Free.
- [Flood Fill](https://tembrica.com/en/flood-fill): Fill the entire board with one color in the fewest moves possible.
- [Durak](https://tembrica.com/en/fool-card-game): Play Durak (Russian Fool) online vs smart AI. 3 difficulty levels, 2-4 players, Podkidnoy and Perevodnoy variants. Free, in browser.
- [Initiative Tracker](https://tembrica.com/en/initiative-tracker): Turn order for combat: roll initiative for everyone at once, rounds, hit points, timed conditions and an SRD bestiary. Works on a phone.
- [Knight’s Tour](https://tembrica.com/en/knights-tour): Move the knight across every square of a 5×5–10×10 board, numbering them 1 to 100. Dead-end warnings and a solver.
- [Lights Out](https://tembrica.com/en/lights-out): Toggle lights to turn them all off. Clicking a light flips it and its neighbors.
- [Tangram](https://tembrica.com/en/matter): Rearrange seven shapes to match the target silhouette. Drag, rotate with R, flip parallelograms with F.
- [Maze Game](https://tembrica.com/en/maze-game): Navigate procedurally generated mazes with increasing difficulty. Four modes from easy to extreme.
- [Memory Game](https://tembrica.com/en/memory-game): Match card pairs to train your memory with adjustable difficulty.
- [Nonogram](https://tembrica.com/en/nonogram): Use number clues to fill cells and reveal hidden pixel art pictures. 20+ puzzles from easy to hard.
- [Penguin Quest](https://tembrica.com/en/penguin-quest): Steer a little penguin over cracks and ice holes, catch fish to stay warm, and journey across the frozen wild to a distant mountain.
- [Pipe Puzzle](https://tembrica.com/en/pipe-puzzle): Rotate pipe segments to connect the water source to every endpoint. Tap or click to rotate.
- [Pocket Pet](https://tembrica.com/en/pocket-pet): Raise a digital pocket pet that grows over weeks. Feed, clean, pet, and watch it evolve. Free, in your browser.
- [Rock Paper Scissors](https://tembrica.com/en/rock-paper-scissors): Play rock paper scissors with buttons or real hand gestures on camera against an AI that learns from your moves.
- [Sliding Puzzle](https://tembrica.com/en/sliding-puzzle): Slide numbered tiles into the correct order. Choose 3x3, 4x4, or 5x5 grid size.
- [Snake Game](https://tembrica.com/en/snake-game): Classic Snake arcade with 4 modes, power-ups and themes.
- [Sokoban](https://tembrica.com/en/sokoban): Push all boxes onto the goal markers. 155 hand-crafted levels from easy to expert.
- [Tank Duel](https://tembrica.com/en/tank-duel): Turn-based artillery duel with 18 weapons, wind and destructible terrain — play vs computer, 2 players, or online.
- [Tic Tac Toe](https://tembrica.com/en/tic-tac-toe): Play against smart bots or with friends by shareable link.
- [Trail](https://tembrica.com/en/trail): Connect numbered points in order while filling every cell on the grid. Daily logic puzzle — free, in your browser.
- [Volleyball Game](https://tembrica.com/en/volleyball-game): Free volleyball game for two players. Play against AI, together on one keyboard, or online with friends.
- [Woodblocks](https://tembrica.com/en/woodblocks): Drop wooden shapes onto the grid, clear lines, and beat your record.
- [World Counter](https://tembrica.com/en/world-counter): Click one button and watch a single live world counter tick upward together. Back your country in the daily click battle. Free, in your browser.

## Internet & Security (14)

- [Browser Fingerprint](https://tembrica.com/en/browser-fingerprint): Real entropy bits, live cohort comparison, defense test, and visual fingerprint art — see exactly how trackable your browser is.
- [Cookie Checker](https://tembrica.com/en/cookie-checker): Scan any website to discover all cookies, trackers, and privacy risks in seconds.
- [DNS Lookup](https://tembrica.com/en/dns-lookup): Look up DNS records for any domain. All record types supported, results from multiple resolvers.
- [IP Lookup](https://tembrica.com/en/ip-lookup): Look up any IP address or domain to see its location, ISP, VPN status, and more.
- [IPv6 Test](https://tembrica.com/en/ipv6-test): Test your IPv6 support, detect connection type, compare latency, and check for leaks.
- [MAC Address Lookup](https://tembrica.com/en/mac-address-lookup): Identify the manufacturer of any network device by MAC address, generate random MACs for testing, and convert between all standard formats.
- [Privacy Audit](https://tembrica.com/en/privacy-audit): Run 25+ privacy and security checks on your browser. Get a score from 0 to 100 with detailed results and recommendations.
- [Redirect Checker](https://tembrica.com/en/redirect-checker): Enter a URL to see the full redirect chain with HTTP status codes, response times, and server details.
- [Speed Test](https://tembrica.com/en/speed-test): Measure download and upload speed, ping, jitter and latency under load (bufferbloat) in 30 seconds.
- [System Diagnostics](https://tembrica.com/en/system-diagnostics): Check CPU, GPU, memory, battery, storage, network, and browser capabilities. Get a health score, run a benchmark, and receive personalized recommendations.
- [VPN Checker](https://tembrica.com/en/vpn-checker): Check if your VPN is working and test for IP, DNS, and WebRTC leaks. Instant anonymity score with detailed results.
- [WebRTC Leak Test](https://tembrica.com/en/webrtc-leak-test): Check if WebRTC is exposing your real IP address. Detect local, public, and mDNS candidates with real-time monitoring.
- [What Is My Browser](https://tembrica.com/en/what-is-my-browser): Instantly detect your browser, OS, screen, hardware, codecs, and web API support. Copy all info for tech support or download a PDF report.
- [WHOIS Lookup](https://tembrica.com/en/whois-lookup): Look up registration details for any domain name including registrar, dates, nameservers, and DNSSEC status.

## Health (32)

- [ADHD Test](https://tembrica.com/en/adhd-test): Free adult ADHD test based on the WHO ASRS-v1.1. A 6-question screener with an instant result, plus the full 18-item checklist. Not a diagnosis.
- [Anxiety Tracker](https://tembrica.com/en/anxiety-tracker): Track your anxiety levels, triggers, and coping strategies with visual charts.
- [Autism Spectrum Test](https://tembrica.com/en/autism-test): Comprehensive autism screening with social, sensory, and masking analysis.
- [Baby Sleep Schedule](https://tembrica.com/en/baby-sleep-schedule): Wake windows by age plus a live daily plan: nap and bedtime targets recalculate from when your baby actually woke, not from an ideal timetable.
- [BAC Calculator](https://tembrica.com/en/bac-calculator): Estimate blood alcohol content via the Widmark formula: peak BAC, sober-up time, when you can legally drive. Free, in your browser.
- [Breathing Exercise](https://tembrica.com/en/breathing-exercise): Guided breathing exercises — Box Breathing, 4-7-8, Wim Hof and 5 more techniques with visual timer.
- [Colorblind Camera Filter](https://tembrica.com/en/colorblind-camera): Allow camera access, choose a CVD type and mode, then see the live filter.
- [Color Name Identifier](https://tembrica.com/en/colorblind-color-namer): Use your camera, upload an image, or enter a color value to identify any color.
- [Colorblind-Safe Palette](https://tembrica.com/en/colorblind-palette): Generate or fix color palettes so they remain distinguishable under all forms of color vision deficiency.
- [Colorblind Simulator](https://tembrica.com/en/colorblind-simulator): Upload an image to compare original and colorblind views side by side.
- [Color Blind Test](https://tembrica.com/en/colorblind-test): For best results, use a screen with good color reproduction at full brightness in a well-lit room. Turn off night mode, True Tone and blue-light filters, which shift colors and can invalidate the test.
- [Daily Routine](https://tembrica.com/en/daily-routine): Pick a template or build your own. Your routine follows the device clock, counts down to the next event and runs in the background.
- [Dementia Screening Test](https://tembrica.com/en/dementia-test): Comprehensive cognitive screening for early detection of dementia risk.
- [Depression Screening Test](https://tembrica.com/en/depression-test): Clinically validated depression screening with mood tracking, wellness toolkit, and PDF report.
- [Due Date Calculator](https://tembrica.com/en/due-date-calculator): Choose a starting point and date to get your estimated due date, gestational age and trimester.
- [Dyslexia Test](https://tembrica.com/en/dyslexia-test): Interactive dyslexia screening with 5 assessments and downloadable PDF report.
- [Eye Test](https://tembrica.com/en/eye-test): Comprehensive vision screening with 8 tests for phone and computer. Visual acuity, near vision, astigmatism, contrast, Amsler grid and more.
- [Eating window](https://tembrica.com/en/fasting-window): Protocol, first meal and sleep — the window, the live countdown and the stages follow from those three.
- [Online Hearing Test](https://tembrica.com/en/hearing-test): Online hearing test with audiometry, speech-in-noise, and gap detection. Get your audiogram and hearing age.
- [Hospital Bag Checklist](https://tembrica.com/en/hospital-bag): A tickable hospital bag list split by bag: documents, labour, postnatal, baby, going home. Adapts to a caesarean, the season and a birth partner.
- [Kegel Exercises](https://tembrica.com/en/kegel-trainer): Pelvic floor trainer with a squeeze timer, breathing cues, a week-by-week programme, technique checks and a separate mode for a tight pelvic floor.
- [Longevity Tests](https://tembrica.com/en/longevity-tests): Four tests: sitting-rising, 30-second chair stands, one-leg balance and VO₂max with a fitness age. Norms by age and sex, in your browser.
- [Panic Button](https://tembrica.com/en/panic-button): Instant emergency calming tool for panic attacks with guided breathing and reassuring voice.
- [PD Meter](https://tembrica.com/en/pd-meter): Take a selfie holding a bank card on your forehead, mark the card and your pupils, and read your PD for ordering glasses.
- [Period calendar](https://tembrica.com/en/period-calendar): A period and ovulation calendar whose forecast shows a range instead of one date.
- [Pulse](https://tembrica.com/en/pulse-meter): Put a finger on the camera and get your heart rate in 25 seconds. The number appears only when the signal is genuinely clean.
- [Running Pace Calculator](https://tembrica.com/en/running-pace-calculator): Enter a distance and the time it took to get your pace, speed and predicted race finish times.
- [Sensory Room](https://tembrica.com/en/sensory-room): Virtual sensory room with calming visuals and ambient sounds for self-regulation and relaxation.
- [Sleep Calculator](https://tembrica.com/en/sleep-calculator): Free sleep cycle calculator: best bedtime to wake up rested, or when to wake if you sleep now. Age-based targets, nap timer, 90-min cycles.
- [Snoring Monitor](https://tembrica.com/en/snoring-monitor): Records and analyzes snoring through your microphone. Get a morning report with Snore Score, loud episodes and trends.
- [Tinnitus Test](https://tembrica.com/en/tinnitus-test): Free tinnitus test: match the frequency of your ringing, find masking noise that covers it, and check the impact. Headphones recommended.
- [Vaccination Calendar](https://tembrica.com/en/vaccination-calendar): A personal immunisation schedule from your child’s date of birth: exact dates, done marks, overdue highlighting and export to your phone calendar.

## Psychology tests (11)

- [Burnout Test](https://tembrica.com/en/burnout-test): Three scales instead of one score: general, work-related and people-related exhaustion — plus whether this is burnout or just fatigue.
- [Cognitive Test](https://tembrica.com/en/cognitive-test): Test attention, memory, reaction time, and spatial reasoning with instant results.
- [EQ Test](https://tembrica.com/en/eq-test): Emotional intelligence measured as a skill, not a questionnaire: read real voices and faces, then see the gap between your score and your self-image.
- [Greed Test](https://tembrica.com/en/greed-test): Seven axes, an SVO slider and an allocation task: the test separates thrift from stinginess and compares what you say with what you choose.
- [Ikigai Test](https://tembrica.com/en/ikigai-test): Find your purpose with the ikigai map: 4 directions, the validated Ikigai-9 scale, a personal diagram and a workshop. Online, no sign-up.
- [IQ Test](https://tembrica.com/en/iq-test): Scientifically-designed IQ test with adaptive matrices, spatial reasoning, and pattern recognition. Get accurate IQ score with confidence interval.
- [Neuro Test](https://tembrica.com/en/mental-acuity): Check your mental sharpness with 7 scientific assessments. Find out your mental age.
- [Personality Type Test](https://tembrica.com/en/personality-test): Your four-letter type plus a full Big Five profile: 5 traits and all 30 facets of character with percentiles. Online, no sign-up.
- [Risk Tolerance Test](https://tembrica.com/en/risk-test): Five risk domains scored apart and a Holt-Laury lottery that yields a real coefficient. No single score: boldness is not one dial.
- [Trust Test](https://tembrica.com/en/trust-test): Both sides of trust at once: how much you extend to people and how much you return when they extended it to you. Trust game included.
- [Workaholism Test](https://tembrica.com/en/workaholism-test): Check yourself with the Bergen Work Addiction Scale and a 5-dimension map: compulsion, overload, the toll on life. Online, no sign-up.

## Measuring (10)

- [Angle Finder](https://tembrica.com/en/angle-finder): A digital inclinometer that reads tilt in degrees, percent, per-mille and roof pitch — plus a clinometer mode for the height of trees and buildings.
- [Bubble Level](https://tembrica.com/en/bubble-level): Digital spirit level using your phone's sensors — 2D surface bubble, inclinometer, plumb line and camera AR with angle export.
- [Compass](https://tembrica.com/en/compass): Browser compass with true north corrected for declination, bearing hold, a sighting mode and an honest accuracy figure.
- [Elevation](https://tembrica.com/en/elevation): Find the elevation at any point on a map, build a profile along a route and get the slope in percent and degrees. Coordinates next to the height.
- [GPS Speedometer](https://tembrica.com/en/gps-speedometer): See your real speed from GPS: max, average, distance and track export. Check what your dashboard reads against true speed. No install.
- [Light Detector](https://tembrica.com/en/light-detector): Press Start Camera to activate your camera. The tool will convert light levels into audio tones.
- [Online Ruler](https://tembrica.com/en/online-ruler): Free online ruler in actual size. Calibrate to your screen and measure in cm, mm and inches — on screen or on a photo.
- [Online Protractor](https://tembrica.com/en/protractor): Online protractor with transparent overlay and photo measurement — mm calibration, multi-angle, PNG/PDF/JSON export. Handy for builders, carpenters and students.
- [Sound Level Meter](https://tembrica.com/en/sound-meter): Measure noise levels in decibels using your device microphone. Free, private.
- [RPM Meter](https://tembrica.com/en/tachometer): Five ways to read rotation speed: by sound, by a marker in the camera, by the phone's gyroscope, by screen strobe and by a printable strobe disc. Plus lamp flicker and PWM.

## Musical instruments (10)

- [Acoustic Guitar](https://tembrica.com/en/acoustic-guitar): Play acoustic guitar with realistic sound synthesis. 70+ chords, strum and arpeggio modes, 5 tunings, recording.
- [Endless Piano](https://tembrica.com/en/endless-piano): Press Play and enjoy endless, ever-changing piano melodies.
- [Virtual Flute](https://tembrica.com/en/flute): A realistic virtual flute you play in the browser — six flute types, a live Boehm fingering chart, breath and vibrato control, MIDI and recording.
- [Guitar Tuner](https://tembrica.com/en/guitar-tuner): Microphone-based guitar tuner with real-time pitch detection. 6 tunings, A4 reference, ±1 cent accuracy.
- [Kalimba](https://tembrica.com/en/kalimba-online): Virtual kalimba with step sequencer, 8-track looper, reverb, delay, Web MIDI in and song library.
- [Beat Maker](https://tembrica.com/en/music-sequencer): Online beat maker with 808/909 drum kits, effects, velocity, MIDI export.
- [Online Piano](https://tembrica.com/en/online-piano): Interactive 88-key virtual piano with 5 voices, MIDI input, recording, learn mode, and chord/scale assistance. Free, no signup.
- [Virtual Organ](https://tembrica.com/en/organ): A dual-engine virtual organ: tonewheel Hammond with drawbars, Leslie and percussion, plus a pipe/church organ with stops and cathedral reverb.
- [Piano Tuner](https://tembrica.com/en/piano-tuner): Strobe tuner that measures string inharmonicity and builds your piano's stretched curve. 88 keys, unisons, interval checks.
- [Virtual Drums](https://tembrica.com/en/virtual-drums): A live-playable drum kit with WebMIDI, recording, metronome, grooves and lessons — no signup.

## Handy Tools (15)

- [Business card maker](https://tembrica.com/en/business-card-maker): Replace the name on the finished card — the rest builds itself.
- [Calendar](https://tembrica.com/en/calendar): Calendar with tasks and repeating entries. Week, month, list. Subscribe from Google or Apple, publish your schedule on your profile.
- [Solid Color Screen](https://tembrica.com/en/color-screen): Fill your entire display with any solid color — presets, HEX/RGB/HSL, brightness, color temperature, and one-click edge-to-edge fullscreen.
- [Bluetooth Keep Alive](https://tembrica.com/en/connection-keeper): Prevent your Bluetooth speakers, headphones, car audio, and hearing aids from disconnecting. An inaudible keep-alive signal stops Bluetooth timeout.
- [E-bike Registry](https://tembrica.com/en/ebike-registry): Register your e-bike for a free ownership passport, or check a frame number against the stolen-bike registry before you buy. Free.
- [Labels & stickers](https://tembrica.com/en/label-maker): Build your own sheet of labels and print it so the ink lands inside the die cuts.
- [Morse Code Decoder](https://tembrica.com/en/morse-decoder): Decode Morse code from audio — record from microphone or upload a file. Real-time analysis to text.
- [Online Flash](https://tembrica.com/en/online-flash): Turn your screen into a flashlight — with strobe, SOS, Morse code, countdown flash, and ambient lamp modes.
- [Online Mirror](https://tembrica.com/en/online-mirror): Free online mirror using your camera.
- [Pet Name Generator](https://tembrica.com/en/pet-names): Browse 1400+ curated names for dogs, cats, parrots, hamsters, rabbits, fish, turtles, horses, reptiles, ferrets, guinea pigs and birds — filter by gender, style, popularity and length.
- [Random Number Generator](https://tembrica.com/en/random-number): Generate random numbers, roll dice, flip coins, pick from lists, create passwords. Crypto-secure, instant, free.
- [Random Word Generator](https://tembrica.com/en/random-word): Generate random words, letters and ideas for games, writing prompts and brainstorming. Instant and free.
- [Keep Screen On](https://tembrica.com/en/screen-awake): Keep your screen on and prevent your device from sleeping — works right in your browser, no installation needed.
- [Tally Counter](https://tembrica.com/en/tally-counter): Count events with one tap: people at the door, knitting rows, training laps. Several categories at once, step, target, undo, pace and CSV export.
- [Ticket Generator](https://tembrica.com/en/ticket-generator): Build numbered event tickets with QR codes, print up to thousands at once, then scan them at the door to check guests in. Free, in your browser.

## Accessibility (20)

- [Audio Compass](https://tembrica.com/en/audio-compass): Navigate by sound with a 3D spatial audio compass.
- [Audio to Vibration](https://tembrica.com/en/audio-to-vibration): Turn music into phone vibration in time with the beat.
- [Camera Text Reader](https://tembrica.com/en/camera-reader): Point your camera at text or upload a photo — the tool recognizes it and reads it aloud.
- [Color Accessibility Checker](https://tembrica.com/en/color-accessibility-checker): Pick two colors to check contrast ratio and colorblind visibility.
- [Color Reader](https://tembrica.com/en/color-reader): Allow camera access to begin. The tool reads the color at the center of the screen.
- [Communication Board](https://tembrica.com/en/communication-board): AAC symbol board with text-to-speech for nonverbal communication.
- [Document Reader](https://tembrica.com/en/document-reader): Upload a PDF, DOCX or TXT and listen to it as an audiobook — with bookmarks, sleep timer and sentence-by-sentence navigation.
- [Dyslexia Reader](https://tembrica.com/en/dyslexia-reader): Customizable reading aid with dyslexia fonts, spacing, focus cues, overlays and text-to-speech.
- [Fingerspelling Practice](https://tembrica.com/en/fingerspelling-practice): Practice fingerspelling in 8 sign languages with interactive quizzes and hand shape diagrams.
- [Focus Session](https://tembrica.com/en/focus-session): Name one step, set a short sprint, and put distractions on a list instead of into your browser.
- [Image to Sound](https://tembrica.com/en/image-to-sound): Turn images into musical melodies or pure spectrogram sound.
- [Live Captions](https://tembrica.com/en/live-captions): Free live captions in your browser. See speech as text in real time.
- [One-Hand Keyboard](https://tembrica.com/en/one-hand-keyboard): Virtual keyboard optimized for single-hand typing with large keys and word prediction.
- [Ramp Slope Calculator](https://tembrica.com/en/ramp-slope-calculator): Enter the rise to climb and pick a slope ratio to get the ramp length, run, slope percent and angle.
- [Reading Ruler](https://tembrica.com/en/reading-ruler): Visual reading ruler and color overlay to help with dyslexia and visual stress.
- [Sign Language Dictionary](https://tembrica.com/en/sign-language-dictionary): Search and learn sign language visually.
- [Sound Alert](https://tembrica.com/en/sound-alert): Monitor loud sounds remotely.
- [Speech Pacer](https://tembrica.com/en/speech-pacer): Visual metronome for speech pacing with breathing coordination and recording.
- [Visual Schedule](https://tembrica.com/en/visual-schedule): Visual daily schedule with icons, timers, and transition alerts for autism and ADHD.
- [Voice Navigator](https://tembrica.com/en/voice-navigator): Control this page with voice commands: scroll, click, go back, and more.

## For Gamers (5)

- [Aim Trainer](https://tembrica.com/en/aim-trainer): Practice your mouse aim with 4 game modes and difficulty levels
- [Gaming PC Scanner](https://tembrica.com/en/gaming-pc-scanner): Scan your PC hardware and get a gaming readiness score with recommendations.
- [Gaming Ping Test](https://tembrica.com/en/gaming-ping-test): Measure your network latency to game server regions worldwide
- [Input Lag Test](https://tembrica.com/en/input-lag-test): Measure the delay from mouse click or key press to visual response with detailed lag breakdown.
- [Reaction Time Test](https://tembrica.com/en/reaction-time-test): Measure your reaction speed in visual, audio, and reflex modes with millisecond precision.

## Electronics (16)

- [555 Timer Calculator](https://tembrica.com/en/555-timer-calculator): Calculate NE555 timer circuits — astable and monostable modes. Frequency, duty cycle, waveform preview, and reverse component calculation.
- [Battery Identifier](https://tembrica.com/en/battery-identifier): Measure a battery on your calibrated screen, or print a true-to-size gauge — then read which battery it is.
- [Breadboard Simulator](https://tembrica.com/en/breadboard-simulator): A virtual solderless breadboard: plug parts into holes, run jumpers — the circuit really computes.
- [Capacitor Code Decoder](https://tembrica.com/en/capacitor-decoder): Decode 3-digit capacitor markings to pF/nF/µF or find the code from a capacitance value. Voltage ratings, tolerance codes, unit converter.
- [Circuit Simulator](https://tembrica.com/en/circuit-simulator): Build and simulate electronic circuits in your browser. Drag-and-drop components, draw wires, real-time voltage and current readouts.
- [LED Resistor Calculator](https://tembrica.com/en/led-calculator): Calculate the current-limiting resistor for any LED circuit. Color presets, series/parallel arrays, power warnings, nearest E24 value.
- [Ohms Law Calculator](https://tembrica.com/en/ohms-law-calculator): Calculate voltage, current, resistance, and power instantly. Interactive Ohm's Law wheel, animated circuit diagram, and practical presets.
- [PCB Trace Width Calculator](https://tembrica.com/en/pcb-trace-calculator): Calculate minimum PCB trace width for a given current using IPC-2221 standard. Supports internal/external layers, multiple copper weights, and voltage drop.
- [Perfboard Layout](https://tembrica.com/en/perfboard-simulator): Lay parts out on a solder board, draw the traces and check the circuit before you pick up the iron.
- [RC Circuit Calculator](https://tembrica.com/en/rc-calculator): Time constant τ = RC, capacitor charge and discharge by τ steps, RC filter cutoff frequency and the charge curve.
- [Delay-line reservoir computing](https://tembrica.com/en/reservoir-computing): Move the feedback gain and watch the reservoir’s memory change.
- [Resistor Color Code Calculator](https://tembrica.com/en/resistor-calculator): Decode resistor color bands or find band colors by resistance value. Interactive SVG, 4/5/6 bands, tolerance range, E-series matching.
- [SMD Code Decoder](https://tembrica.com/en/smd-decoder): Decode SMD component markings — 3-digit, 4-digit, and EIA-96 codes for resistors and capacitors. Reverse lookup and package size reference.
- [Base Resistor Calculator](https://tembrica.com/en/transistor-base-calculator): Base resistor for a transistor switch: base current with a saturation margin, E24 value rounded down and resistor power.
- [Voltage Divider Calculator](https://tembrica.com/en/voltage-divider-calculator): Calculate voltage divider output, find R1/R2 from desired Vout, E24 matching, load effects, tolerance analysis, and power dissipation.
- [Wire Gauge Calculator (AWG)](https://tembrica.com/en/wire-gauge-calculator): Find the right wire gauge for your project. AWG↔mm² converter, voltage drop calculator, ampacity tables, copper and aluminum support.

## Clocks & Time (19)

- [Age Calculator](https://tembrica.com/en/age-calculator): Free age calculator: your exact age in years, months, days, hours, minutes, seconds — plus next birthday countdown. Free, in-browser.
- [Online Chess Clock](https://tembrica.com/en/chess-clock): Free chess clock for two players on one device — Bullet, Blitz, Rapid, Classical with Fischer, Bronstein and delay modes.
- [Countdown to Date](https://tembrica.com/en/countdown-to-date): Live countdown timer to any date with themes, full-screen and shareable link
- [Date Difference Calculator](https://tembrica.com/en/date-difference-calculator): Days between two dates, business days and holidays
- [Days Without Incidents](https://tembrica.com/en/days-without-incidents): Count days since the last incident, track your record, and show it full-screen, in print or by link.
- [Hourglass Timer](https://tembrica.com/en/hourglass-timer): Set a duration and watch the sand run through the glass.
- [Hours Calculator](https://tembrica.com/en/hours-calculator): Free work-hours calculator: enter shifts with start, end and breaks, get weekly totals, overtime and pay. Export CSV. Free, in-browser.
- [How Many Days Have I Lived](https://tembrica.com/en/how-many-days-alive): See exactly how many days you have lived since birth — with weeks, hours, a live counter, milestone dates and your life in weeks. Free.
- [Julian ↔ Gregorian](https://tembrica.com/en/julian-gregorian-converter): Convert dates between Julian (old style) and Gregorian (new style) calendars. Automatic shift per era, Orthodox feasts, Easter dates. Free.
- [Kitchen Timer](https://tembrica.com/en/kitchen-timer): Set multiple cooking timers with preset recipes and sound alerts.
- [Military Time Converter](https://tembrica.com/en/military-time-converter): Convert between 24-hour military time and 12-hour AM/PM format with live sync, batch mode and reference chart.
- [Moment of Silence](https://tembrica.com/en/moment-of-silence): Light a virtual candle and observe a moment of silence to honor someone's memory. Timer, ambient sounds, personalization.
- [Online Alarm Clock](https://tembrica.com/en/online-alarm-clock): Free online alarm clock with timer, stopwatch, Pomodoro, and world clock. 12 alarm sounds, math puzzle dismiss, screen awake.
- [Online Clock](https://tembrica.com/en/online-clock): Six clock types with educational guides and timezone support.
- [Online Timer](https://tembrica.com/en/online-timer): Free online timer: run several labeled countdowns at once, plus Pomodoro and HIIT interval modes, fullscreen, and alarm sounds.
- [Online Stopwatch](https://tembrica.com/en/stopwatch): Precise online stopwatch with laps, splits, sparkline and shareable link
- [Time Blindness Helper](https://tembrica.com/en/time-blindness-helper): Visual time awareness tool with color-coded countdowns for ADHD time blindness.
- [Unix Timestamp Converter](https://tembrica.com/en/unix-timestamp-converter): Convert Unix timestamps to ISO 8601, UTC, RFC 2822 and relative time, or any date back to epoch seconds. Batch mode and live counter. Free.
- [Visual Timer](https://tembrica.com/en/visual-timer): A timer where the remaining time is a shape, not a number.

## Images (28)

- [Background Remover](https://tembrica.com/en/bg-remover): Upload a shot: the subject is separated from the background, and you decide what goes behind it.
- [Face retouching: shine, blemishes and skin tone](https://tembrica.com/en/face-retouch): Face retouching that removes oily shine by the colour of the light, clears blemishes, evens skin tone and lifts under-eye circles. Pores stay.
- [HEIC to JPG Converter](https://tembrica.com/en/heic-converter): Convert iPhone HEIC photos to JPG, PNG, or WebP. Batch conversion, auto-rename, quality control.
- [Color Picker from Photo](https://tembrica.com/en/image-color-picker): Upload a photo and drag across it — the loupe shows the exact pixel while the tool reads the colour in six formats, names the shade and finds the nearest RAL.
- [Image Compression Without Visible Quality Loss](https://tembrica.com/en/image-compressor): Compress JPG, PNG, WebP and HEIC to a target size. The point where the difference becomes visible is measured per image, not set by a slider.
- [Image Metadata Editor](https://tembrica.com/en/image-metadata): View, edit or remove EXIF, IPTC, XMP and GPS data from your photos
- [Document photo](https://tembrica.com/en/passport-photo): Upload a front-facing portrait — your face is fitted to the size of the document you pick.
- [Photo Colorizer](https://tembrica.com/en/photo-colorize): Turn old black-and-white photos into colour with AI, right in your browser.
- [Verify Photo Credentials](https://tembrica.com/en/photo-credentials-verify): Drop a JPEG signed by Tembrica Photo Watermark — verify the signature.
- [Photo cropping without quality loss](https://tembrica.com/en/photo-crop): Crop a photo by frame, ratio or exact pixels. JPEG is cut without re-encoding. Also: circle crop, print size in cm, tiles and a poster across A4.
- [Photo editor](https://tembrica.com/en/photo-editor): Layered photo editor with curves, HSL, masks, AI background removal and one-click export presets. Runs in your browser, no installation.
- [AI Photo Enhancer & Upscaler](https://tembrica.com/en/photo-enhancer): AI ×4 upscaling, a print-fit calculator with dpi stamping, plus optional sharpen, contrast and saturation. All in your browser.
- [Photo Frames](https://tembrica.com/en/photo-frame): Put your photo in a frame online: mats, polaroid, holiday frames, captions and ready greetings. Full resolution, print at 10×15 or A4.
- [Photo Location Finder](https://tembrica.com/en/photo-location): Extract GPS & metadata from photos. View location on map, strip data for privacy.
- [Photo markup](https://tembrica.com/en/photo-markup): Annotate photos and screenshots — arrows, numbered steps, text, blur faces, filters and layers. Paste from clipboard, copy back in one click.
- [Photo Repair](https://tembrica.com/en/photo-repair): Diagnose JPEG corruption, repair file headers, denoise old scans and recover photos that won't open.
- [Old Photo Restoration](https://tembrica.com/en/photo-restore): Restores blurry and damaged faces on old snapshots: the neural network brings eyes and facial features back into focus, while auto-tone revives faded shades. Try the before/after examples in one click — no file needed.
- [Photo Watermark](https://tembrica.com/en/photo-watermark): Stamp text, logo, or diagonal tiles on a single photo or a whole batch — with optional Content Credentials.
- [PSD viewer](https://tembrica.com/en/psd-open): Drop the .psd or .psb file — a layered document is fine.
- [Redact Photo](https://tembrica.com/en/redact-photo): Blur, pixelate or black out faces, text and numbers on a photo or screenshot. Finds IDs and card numbers for you, then checks they are unreadable.
- [Metadata Remover](https://tembrica.com/en/remove-metadata): Strip capture coordinates, camera serial numbers, dates and hidden payloads from your photos — one at a time or in bulk
- [Screenshot Tool](https://tembrica.com/en/screenshot): Capture your screen, paste from clipboard, or upload an image — annotate, crop, blur and export.
- [Screenshot Beautifier](https://tembrica.com/en/screenshot-beautify): Add device or browser frames, gradient backgrounds, shadows and rounded corners to screenshots. Razor-sharp 2x/4x PNG export. In your browser.
- [Social Media Photo Resizer](https://tembrica.com/en/social-photo-resize): Resize photos for 12 social platforms — Instagram, TikTok, Facebook, YouTube, and more. Smart crop, blur background, batch download as ZIP.
- [Takeout photo dates](https://tembrica.com/en/takeout-dates): Drop the photos together with their json files from the Google export.
- [Text Behind Image](https://tembrica.com/en/text-behind-image): Put text behind a person or object in photos and video: AI cuts out the subject so the words sit behind it. Fonts, gradients, outlines.
- [Thumbnail Maker](https://tembrica.com/en/thumbnail-maker): Design click-worthy thumbnails and video covers — bold outline text, photos, presets, photo tweaks and a true-resolution export, all in your browser.
- [WEBP to JPG Converter](https://tembrica.com/en/webp-to-jpg): Convert WEBP images to JPG right in your browser: batch, transparency background choice and quality control. Animated WEBP exports every frame.

## GIF Animation (7)

- [Add Audio to GIF](https://tembrica.com/en/gif-audio): Add music or sound effects to any GIF. Convert to MP4/WebM with audio. Waveform editor, trim, fade in/out, sync modes. No watermark.
- [GIF Compressor](https://tembrica.com/en/gif-compressor): Online GIF compressor.
- [GIF Speed](https://tembrica.com/en/gif-speed): A tool for changing the pace of an animated GIF with per-frame precision.
- [GIF to Video](https://tembrica.com/en/gif-to-video): Turn any animated GIF into MP4, WebM or APNG directly in your browser. Platform presets, target-size mode, loop-to-duration, boomerang, transparent background fill.
- [Trim GIF](https://tembrica.com/en/gif-trim): Online GIF trimmer with frame-level precision and automatic loop detection.
- [GIF from Photos](https://tembrica.com/en/photo-to-gif): Drop your photos in — drag to reorder, and each frame gets its own duration. Animated GIFs are split into their frames and joined.
- [Video to GIF](https://tembrica.com/en/video-to-gif): Convert video to animated GIF.

## Projectors (22)

- [AV Sync (Lip Sync) Test](https://tembrica.com/en/av-sync-test): Synchronised flash + click. Record on your phone, count frames between flash and audio peak, multiply by 16.7 ms.
- [Bias Light Calculator](https://tembrica.com/en/bias-light-calculator): Calculates LED strip length, recommended brightness, and the right colour temperature for the bias light behind your screen.
- [Presentation Countdown](https://tembrica.com/en/presentation-countdown): Pick a duration, press Start. Huge digits fill the projector — readable from anywhere in the room. Beeps at countdown < 10 s and at zero.
- [Projector 3D Test](https://tembrica.com/en/projector-3d-test): Five test patterns for 3D projector calibration: anaglyph, L/R separation, depth, crosstalk, convergence. Wear your 3D glasses (red-cyan or active shutter).
- [Projector Camera Analyzer](https://tembrica.com/en/projector-camera-analyzer): Point your phone camera at the projected image. Get live RGB histogram, white balance check, 9-zone uniformity score, and clipping detection.
- [Projector Color Temperature Test](https://tembrica.com/en/projector-color-temp-test): Eight calibration points from warm 2700K tungsten through D65 daylight to 9300K cool. Fullscreen with keyboard nav.
- [Projector Edge Blending](https://tembrica.com/en/projector-edge-blending): Soft-edge gradient overlap pattern for multi-projector setups. Adjustable overlap percentage, gamma-correct ramp, four edges.
- [Projector Focus Test](https://tembrica.com/en/projector-focus-test): Five focus patterns to lock perfect sharpness on any projector. Fullscreen, keyboard and swipe nav.
- [Projector Gamma Test](https://tembrica.com/en/projector-gamma-test): Side-by-side gamma reference patterns for 1.8, 2.2, 2.4 and BT.1886. The 1px-stripe half should blend with the reference grey at correct gamma.
- [Projector HDR Test](https://tembrica.com/en/projector-hdr-test): PQ-encoded test patterns for HDR projectors: nit-step ramp, clipping check at 800–1500 nits, near-black detail, peak-white reference, Rec.709 vs Rec.2020 gamut comparison.
- [Projector Keystone Alignment Grid](https://tembrica.com/en/projector-keystone-grid): Adjustable fullscreen grid with edge markers for keystone, lens shift and geometry calibration.
- [Projector Lumens Calculator](https://tembrica.com/en/projector-lumens-calculator): Get the recommended ANSI lumens for your screen size, room lighting and content type (SDR/HDR).
- [Projector Noise Meter](https://tembrica.com/en/projector-noise-meter): Microphone-based sound-level meter with A-weighting. Place phone 1 m from projector, press Start, get peak/avg/min readings.
- [Projector Screen Size Calculator](https://tembrica.com/en/projector-screen-calculator): Diagonal to width × height for any aspect ratio, plus optimal viewing distance per THX (36°) and SMPTE (30°).
- [Projector TCO Calculator](https://tembrica.com/en/projector-tco-calculator): Total cost of ownership over the period you choose: purchase + replacement lamps + electricity. Reveals whether a lamp or laser projector saves money for your usage.
- [Projector Test Patterns](https://tembrica.com/en/projector-test): Focus, color, geometry, contrast and convergence patterns. Control from your phone via QR code.
- [Projector Throw Distance Calculator](https://tembrica.com/en/projector-throw-distance): Find the right placement for any projector. Works with raw throw ratio — no model lookup required.
- [Projector vs TV](https://tembrica.com/en/projector-vs-tv): Tell us your budget, room and use case. Get a clear recommendation with a side-by-side comparison.
- [Projector Warmup / Run-In](https://tembrica.com/en/projector-warmup-cycle): Auto-cycles colour fields, gradients and motion patterns for the duration you set. Helps equalise panels on a new LCD or DLP projector.
- [DIY Screen Paint Calculator](https://tembrica.com/en/screen-paint-calculator): Specifies the right grey paint (Behr or Sherwin-Williams) for your room lighting and calculates how much paint, primer and pearl additive you need.
- [Speaker Positioning Guide](https://tembrica.com/en/speaker-positioning-guide): Top-down diagrams for each system. Shows correct angles per Dolby/THX standards: front 30°, surround 90–110°, rear 150°, height ±45° elevation.
- [Viewing Distance Calculator](https://tembrica.com/en/viewing-distance-calculator): Resolution-aware calculator. Tells you minimum, optimal and maximum seating distance for your screen — 4K lets you sit closer than 1080p.

## Space & nature (18)

- [Aurora Forecast](https://tembrica.com/en/aurora-forecast): Live aurora oval map plus a straight answer on whether the northern lights are visible from your spot tonight: darkness, cloud, moon, Kp.
- [3D Earth Globe](https://tembrica.com/en/earth-globe): Interactive 3D Earth globe with real-time day & night, sun position, country search and live ISS tracking. Free, in your browser.
- [Earth Meter](https://tembrica.com/en/earth-meter): World statistics update live: population, environment, energy, technology, economy.
- [Earthquake Map](https://tembrica.com/en/earthquake-map): A live map of recent earthquakes worldwide from USGS and EMSC — magnitude, depth and time for each quake, updated continuously. Free.
- [Earthquake simulator](https://tembrica.com/en/earthquake-simulator): See how hard a given magnitude shakes your city: intensity contours on a real map, a synthetic seismogram and building response. Runs in the browser.
- [Eclipses](https://tembrica.com/en/eclipse-tracker): Upcoming solar and lunar eclipses: path of totality on a map, start and maximum times for your city, how much of the Sun is covered and its altitude.
- [Beaufort scale](https://tembrica.com/en/hurricane-simulator): Wind force in numbers: the full Beaufort table, the Saffir-Simpson categories, and what wind a hurricane would deliver to your city.
- [Light Pollution Map](https://tembrica.com/en/light-pollution-map): See light pollution on a map and tap anywhere for the exact night-sky brightness in mag/arcsec² — find the darkest skies near you. Free.
- [Measure on map](https://tembrica.com/en/map-measure): Trace a plot on the map and get its area on the WGS84 ellipsoid — in hectares or acres — not the area of the picture on screen.
- [Meteor Showers](https://tembrica.com/en/meteor-showers): See the next meteor shower, a live peak countdown, and whether the radiant is up, the sky dark and the moon out of the way for your location. Free.
- [Moon](https://tembrica.com/en/moon): Moon phase now, lunar day counted from moonrise at your location, rise and set, distance and a phase calendar. 3D globe with real libration.
- [Satellite Tracker](https://tembrica.com/en/satellite-tracker): Track satellites live on a map, see Starlink, and find out when the ISS will pass over your location — propagated in your browser. Free.
- [Solar System](https://tembrica.com/en/solar-system): Interactive Solar System model: planets in their real positions now, today’s distance to Mars, planetary alignments and your weight on each planet.
- [Space Weather](https://tembrica.com/en/space-weather): Live Kp index, geomagnetic storm level, solar wind and the aurora forecast on a map. See if the northern lights are visible tonight.
- [Sun & Moon](https://tembrica.com/en/sun-moon-tracker): Find sunrise, sunset, golden hour, day length and the moon phase for any location, with live sun and moon directions on a map. Free.
- [Weather](https://tembrica.com/en/weather): Hourly and 9-day weather from two independent forecast models at once — with the disagreement between them shown, not hidden.
- [Wildfire Map](https://tembrica.com/en/wildfire-map): A live map of active wildfire hotspots worldwide from NASA satellites — heat detections from the last 24 hours, ranked by fire power. Free.
- [Wind Map](https://tembrica.com/en/wind-map): Watch live animated wind across the globe from the GFS model — wind speed and direction anywhere, with a reading for your own location. Free.

## Calls & sharing (7)

- [File Transfer](https://tembrica.com/en/file-transfer): Drop a file or folder, share the 6-letter code or QR — the transfer flows directly between browsers.
- [Remote Audio Monitor](https://tembrica.com/en/live-audio): Listen to a microphone on another device live — a remote audio monitor for a room, office, workshop or any space. Also streams files and tabs.
- [Live Location Sharing](https://tembrica.com/en/live-location): Share your live location with people on a map, in real time — right in the browser, no app.
- [Private Chat](https://tembrica.com/en/private-chat): Encrypted, no signup, peer-to-peer — share a link and chat privately.
- [Screen Sharing](https://tembrica.com/en/screen-share): Share your screen with anyone via a link or 6-letter code. No camera, optional voice, nothing to install.
- [Share Location](https://tembrica.com/en/share-location): Find, view, and share your GPS location with an interactive map and compass.
- [Walkie-Talkie](https://tembrica.com/en/walkie-talkie): Push-to-talk voice chat in your browser. Create a channel, share the code, and talk in groups.

## Passwords & Secrets (16)

- [Bitwarden Converter](https://tembrica.com/en/bitwarden-converter): Convert password vault exports between Bitwarden JSON, KeePass, Chrome, Firefox, 1Password and LastPass CSV. Runs in your browser, no installation.
- [Digital Will](https://tembrica.com/en/digital-will): What Google, Apple and password managers already offer, what to write down, and how to split the key so nobody opens the envelope alone.
- [KeePass Viewer](https://tembrica.com/en/keepass-viewer): Open a KeePass .kdbx database in your browser. View entries, export to JSON / CSV, no installation. KDBX4 and KDBX3 supported.
- [One-Time Secret Share](https://tembrica.com/en/one-time-secret-share): Share a secret via an encrypted link. AES-GCM 256-bit, decryption key lives in the URL fragment. No account, no database.
- [OTP Auth QR Decoder](https://tembrica.com/en/otpauth-qr-decoder): Decode a Google Authenticator / Authy QR screenshot back into its TOTP secret. Migrate to Aegis, 1Password or any other app. Runs in your browser.
- [Passphrase Generator](https://tembrica.com/en/passphrase-generator): Memorable passphrase generator using diceware-style word selection. 2048-word list, configurable separators, capitalization, and live entropy.
- [Password Audit](https://tembrica.com/en/password-audit): Audit an exported password vault (Bitwarden, KeePass, Chrome, Firefox, 1Password). Flags weak, reused and breached passwords using HIBP k-anonymity.
- [Password Breach Checker](https://tembrica.com/en/password-breach-checker): Check if your password appears in known data breaches using Have I Been Pwned's k-anonymity API. Fast, free, no account needed.
- [Password Generator](https://tembrica.com/en/password-generator): Password generator with strength meter, pronounceable mode, pattern syntax, bulk export. Cryptographically secure via Web Crypto API.
- [Password Strength Checker](https://tembrica.com/en/password-strength-checker): Test your password strength with Dropbox's zxcvbn engine. Real entropy estimate, crack-time scenarios and dictionary-attack warnings.
- [PGP Key Generator](https://tembrica.com/en/pgp-keygen): Generate PGP / OpenPGP keys (RSA, Curve25519) in your browser. Encrypt, decrypt, sign and verify. Works with GnuPG, Thunderbird, ProtonMail.
- [Secret Language](https://tembrica.com/en/secret-language): Type a secret, get innocent-looking text to send anywhere; paste it back to recover the exact message.
- [Secret Vault](https://tembrica.com/en/secret-vault): Encrypted diary, password manager and file safe — AES-256-GCM encryption in your browser via Web Crypto API.
- [Shamir Secret Sharing](https://tembrica.com/en/shamir-secret-sharing): Split a secret into N shares where any K of them reconstruct it. Browser implementation over GF(256) for master passwords and seed phrases.
- [Steganography](https://tembrica.com/en/steganography): Hide secret text, files, or images inside pictures using LSB steganography. Optional AES-256 encryption.
- [TOTP Generator](https://tembrica.com/en/totp-generator): Generate TOTP secrets for two-factor authentication. Live 6-digit code, QR for Google Authenticator / Authy / Aegis, RFC 6238 compliant.

## English language (23)

- [Anki Deck Builder](https://tembrica.com/en/anki-deck-builder): Paste a word list and build a real Anki .apkg deck — with IPA, audio and a built-in study mode. Free, in your browser.
- [English Collocations](https://tembrica.com/en/collocations): Look up an English word and see its natural collocations — the verbs and adjectives that go with it — grouped by pattern with examples. Free.
- [English Dictation Practice](https://tembrica.com/en/dictation-practice): Listen to graded English sentences and type what you hear. Word-by-word error highlighting, A1–C2 levels, adjustable speed. Free, in the browser.
- [English Grammar Course](https://tembrica.com/en/english-grammar-course): Learn English grammar by CEFR level A1–C2. Free course with clear lessons, exercises and progress tracking, in your browser.
- [English Level Converter](https://tembrica.com/en/english-level-converter): Convert any English score between CEFR, IELTS, TOEFL, Cambridge and Duolingo, and calculate your IELTS overall band. Free, in the browser.
- [English Level Test](https://tembrica.com/en/english-level-test): Adaptive English level test: vocabulary, grammar, reading and listening. Get your CEFR level with IELTS and TOEFL equivalents. Online, no signup.
- [English False Friends](https://tembrica.com/en/false-friends): Browse and quiz English false friends — words that look like a word in your language but mean something else. RU, DE, ES, FR, PT. Free.
- [Gap-Fill Generator](https://tembrica.com/en/gap-fill-generator): Turn any text into a fill-in-the-blanks exercise. Choose how words are removed, do it on screen or print a worksheet with an answer key. Free.
- [IELTS Speaking Timer](https://tembrica.com/en/ielts-speaking-timer): Practise IELTS Speaking with a Part 2 cue-card timer (1 min prep, 2 min talk), random cue cards and Part 1 & 3 question banks. Free.
- [English Irregular Verbs](https://tembrica.com/en/irregular-verbs): A searchable table of 130+ English irregular verbs grouped by pattern, plus a typing trainer for past simple and past participle. Free.
- [Minimal Pairs](https://tembrica.com/en/minimal-pairs): Train your ear on tricky English sounds — ship vs sheep, light vs right. A minimal pairs listening drill, in your browser.
- [English Phrasal Verbs](https://tembrica.com/en/phrasal-verbs): A searchable list of 100+ English phrasal verbs with meanings and examples, filterable by particle and CEFR level, plus a fill-in trainer. Free.
- [Sentence stress](https://tembrica.com/en/sentence-stress): Shows the main stress of each phrase, its thought groups and weak forms. Move the stress to any word, or record yourself and compare the rhythm.
- [Shadowing Studio](https://tembrica.com/en/shadowing-studio): Loop and slow down any audio or video, record yourself shadowing it, and compare your waveform and pitch side by side. Free, in the browser.
- [English Spelling Test](https://tembrica.com/en/spelling-test): Hear an English word and spell it. Four difficulty tiers, example sentences, letter-by-letter error marking and a streak counter. Free.
- [Subtitle vocabulary](https://tembrica.com/en/subtitle-vocabulary): Drop in an .srt and see how much of the dialogue you would follow, and which words to learn before you press play.
- [Syllable Counter](https://tembrica.com/en/syllable-counter): Count the syllables in any English word or text. Dictionary-accurate, with a poetry mode for haiku. Free, in your browser.
- [Text to IPA](https://tembrica.com/en/text-to-ipa): Turn English text into IPA phonetic transcription: context-aware readings, weak forms, stress and syllables, British and American.
- [Vocabulary Size Test](https://tembrica.com/en/vocabulary-size-test): Estimate how many English words you know. A quick, science-based vocabulary size test with a CEFR estimate. Free, no sign-up.
- [My English Word List](https://tembrica.com/en/vocabulary-trainer): Type a word — level, transcription and pronunciation fill themselves in. The card returns the day you start forgetting it, scheduled by FSRS.
- [English Vowel Trainer](https://tembrica.com/en/vowel-trainer): Hold the vowel like a long, steady note — don't say the consonants around it. Record somewhere quiet for the clearest reading.
- [Word of the Day](https://tembrica.com/en/word-of-the-day): A new English word each day with translation, meaning, examples and audio. Save and review words with spaced repetition. Free, in your browser.
- [Word Stress](https://tembrica.com/en/word-stress): Find which syllable to stress in any English word. Shows the stressed syllable, IPA and noun/verb pairs like REcord vs reCORD. Free, in your browser.

## Detectors (5)

- [AI Audio Detector](https://tembrica.com/en/ai-detector): Upload an audio file to detect AI-generated content. 12 acoustic methods + opt-in deep stem analysis.
- [Audio Logger](https://tembrica.com/en/audio-logger): Record audio continuously for hours.
- [Baby Monitor](https://tembrica.com/en/baby-monitor): Turn two devices into a baby monitor with cry detection, lullabies, and two-way talk. P2P encrypted.
- [Caller check](https://tembrica.com/en/caller-check): Family safe word, the call-back rule and voice comparison with a saved sample. Disproves a "relative in trouble" call; never confirms identity.
- [Video Surveillance](https://tembrica.com/en/video-surveillance): AI security camera (people, pets, vehicles) or analyse an existing recording by timestamp. P2P, in your browser.

## Text Tools (18)

- [Anglicism Checker](https://tembrica.com/en/anglicism-checker): Paste a URL, text, or upload a file — get a clarity score, heatmap and per-word native alternatives.
- [ASCII Text Art](https://tembrica.com/en/ascii-text): Turn any text into ASCII block art. Pick a font (Banner, Big, Standard, Bubble), copy, paste into chat or code comments.
- [Emoji catalog](https://tembrica.com/en/emoji): Browse 1 940 Unicode emojis with names in 10 languages. Search by paste, hex or :shortcode, copy in one click, download SVG/PNG. Free.
- [Fancy Text Generator](https://tembrica.com/en/fancy-text): Unicode text styles: math alphabets, circles and squares, strikethrough, heart joiners, nickname frames — copied in one click.
- [Keyboard Layout Converter](https://tembrica.com/en/keyboard-layout-converter): Convert between 12 keyboard layouts with auto-detection — QWERTY, Cyrillic, Korean, Arabic and more.
- [Lorem Ipsum](https://tembrica.com/en/lorem-ipsum): Generate placeholder text in 10 languages — exact word or character count, HTML, Markdown or plain. Presets for meta, tweet, SMS.
- [Nickname generator](https://tembrica.com/en/nickname-generator): Generate a nickname, decorate it with symbols and instantly see where it will be accepted: Steam, Telegram, Discord, Minecraft and more.
- [Text Rewriter](https://tembrica.com/en/paraphraser): Rewrite editor: paraphrase, change tone, shorten, simplify or fix your text — in its own language, with the changes highlighted.
- [Poem generator](https://tembrica.com/en/poem-generator): Write a poem to your own brief: occasion, recipient, form, metre and rhyme scheme. 22 fixed forms from sonnet to haiku.
- [Poetry Analyzer](https://tembrica.com/en/poetry-analyzer): Analyse poems: detect metre (iambic, trochaic, dactylic), rhyme scheme, syllable count and spellcheck. For students and writers. Free.
- [Profanity Filter](https://tembrica.com/en/profanity-checker): Check any text for profanity and censor swear words across 10 languages.
- [AI prompt generator](https://tembrica.com/en/prompt-generator): Ready-made prompts for photos, chat, video and music, plus a builder that assembles your own prompt part by part and shows what is missing.
- [Punctuation & Spell Checker](https://tembrica.com/en/punctuation-checker): Check Russian and English punctuation, commas, dashes and spelling — with rule explanations and one-click fix. Russian has an advanced in-browser spell-checker.
- [Synonyms of a word](https://tembrica.com/en/synonyms): Find synonyms for any word in 9 languages — our vetted dictionary plus Wiktionary, grouped by meaning. Online, no sign-up.
- [Teleprompter](https://tembrica.com/en/teleprompter): Teleprompter that paces by words, follows your voice through the whole script, and records the take on camera.
- [Text Formatter](https://tembrica.com/en/text-formatter): All-in-one text formatter: 60+ operations for case conversion, cleaning, encoding, fancy text. Runs in the browser.
- [Handwriting from typed text](https://tembrica.com/en/text-to-handwriting): Turns typed text into a page written by hand: handwriting styles, ruled paper, transparent PNG and PDF. Also writes by hand into an existing PDF form.
- [Word Counter](https://tembrica.com/en/word-counter): Count words, characters, sentences, paragraphs. Readability scores, keyword density, social media limits. Free, runs in your browser.

## Developer Tools (18)

- [Base64](https://tembrica.com/en/base64): Encode and decode Base64 in the browser. UTF-8 safe, URL-safe variant, file uploads. Auto-detect direction. Free.
- [Checksum Calculator](https://tembrica.com/en/checksum-calculator): Hash any file with 6 algorithms. Verify downloads, compare files, find duplicates.
- [Cron Parser](https://tembrica.com/en/cron-parser): Parse and explain cron expressions. See the next 10 run times in your timezone, with human-readable description and field breakdown.
- [Font converter](https://tembrica.com/en/font-converter): Convert TTF, OTF, WOFF and WOFF2 in any direction, subset by language, pin variable axes and repair vertical metrics. Runs in the browser.
- [Hash Generator](https://tembrica.com/en/hash-generator): Calculate MD5, SHA-1, SHA-256, SHA-384, SHA-512 and CRC32 hashes for text or files in your browser. HMAC, hex or base64.
- [Hash Identifier](https://tembrica.com/en/hash-identifier): Identify the algorithm behind any hash: MD5, SHA-256, bcrypt, Argon2, NTLM and 50+ more. Ranked matches with hashcat & John modes. Free.
- [HTML Formatter](https://tembrica.com/en/html-formatter): Beautify or minify HTML in your browser. Indent options, comment removal, void-element handling, preserves <pre>/<script>/<style> content.
- [JSON ↔ CSV](https://tembrica.com/en/json-csv): Convert between JSON arrays and CSV files. Auto-detect direction, configurable delimiter, type coercion, header row toggle. Free, in browser.
- [JSON Formatter](https://tembrica.com/en/json-formatter): Beautify, minify, and validate JSON in the browser. Live error line/column, 2/4/Tab indent. Free, no signup.
- [JWT Decoder](https://tembrica.com/en/jwt-decoder): Decode and inspect JSON Web Tokens in the browser. Header, payload, expiry, claims explained. No signing. Free.
- [Markdown Preview](https://tembrica.com/en/markdown-preview): Live Markdown editor with GitHub-flavored preview. Side-by-side, sync scroll, export HTML, all in your browser.
- [Query String](https://tembrica.com/en/query-string): Parse, edit and build URL query strings. Visual table editor, automatic encode/decode, array notation, JSON export.
- [Regex Tester](https://tembrica.com/en/regex-tester): Test JavaScript regular expressions in the browser. Highlight matches, see groups, preview replacement. Free.
- [Slug Generator](https://tembrica.com/en/slug-generator): Generate URL-friendly slugs from text. Transliterate Cyrillic and Latin diacritics, choose separator, strip stop words, set max length.
- [Text Diff](https://tembrica.com/en/text-diff): Compare two texts side by side. Line, word and character-level diff with insertion/deletion highlighting. Free, in your browser.
- [URL Encoder](https://tembrica.com/en/url-encoder): Encode and decode URL strings in the browser. Component vs full-URL mode, + for space, auto-detect. Free.
- [UUID Generator](https://tembrica.com/en/uuid-generator): Generate UUID v4 (random), v7 (time-ordered), v1 (timestamp) or Nil UUIDs in your browser. Bulk, formatted, validated. Free.
- [YAML Formatter](https://tembrica.com/en/yaml-formatter): Format, validate, and convert YAML in your browser. YAML ↔ JSON bidirectional, indent options, multi-document support.

## Creative (12)

- [Air Draw](https://tembrica.com/en/air-draw): A free tool to draw in the air with your hand: a hand-tracking model follows your fingertip and a neon brush paints the line. Pinch your fingers to draw, open them to stop.
- [AR drawing](https://tembrica.com/en/ar-drawing): A picture sits semi-transparent over your camera feed so you can trace it on real paper. Outlines from photos, grid, perspective fix. In the browser.
- [Collaborative book](https://tembrica.com/en/collab-book): Write a book together: start a story or add a page to someone else's. Append-only — nobody can delete your page, editable for 24h.
- [Color Converter](https://tembrica.com/en/color-converter): Convert between HEX, RGB, RGBA, HSL, HSLA, HWB, LAB, LCH and OKLCH. Shade and tint palette, WCAG contrast check, eyedropper.
- [Color Mixer](https://tembrica.com/en/color-mixer): Mix two or more colors and see the real result — like real paint (blue + yellow = green), as light, or digital. In your browser.
- [Country flags](https://tembrica.com/en/country-flags): An online tool for the flags of the world: filter by colour, check the proportion and colour codes, download PNG or SVG — or set the cloth waving in the wind.
- [Drawing for Kids](https://tembrica.com/en/drawing): Free online drawing tool for kids with brushes, stamps, pixel art mode, 120+ shapes, and color palette.
- [Kaleidoscope](https://tembrica.com/en/kaleidoscope): Draw on the canvas — every stroke is mirrored into a symmetrical kaleidoscope pattern.
- [Spirograph](https://tembrica.com/en/spirograph): Adjust the ring, gear and pen sliders to draw geometric spirograph curves.
- [Stereo Pictures Maker](https://tembrica.com/en/stereo-pictures): Make Magic Eye autostereograms, anaglyph 3D, cross-eye and wiggle GIFs from a 100-preset gallery, your photo, depth map or text. Free, in browser.
- [Wall Newspaper](https://tembrica.com/en/wall-newspaper): Build a printable wall newspaper for school holidays, classroom corners or birthdays — drop in photos, text and stickers, then print across A4 sheets.
- [Online Whiteboard](https://tembrica.com/en/whiteboard): A board per student, no sign-up; LaTeX formulas and graphs, chalkboard and grid, PDF pages, stylus pressure. Send a link — the lesson starts.

## Robotics (14)

- [Cobot Safety Distance Calculator](https://tembrica.com/en/cobot-safety-distance-calculator): Compute the minimum protective separation distance (S) for collaborative robot cells per ISO 13855.
- [Forward Kinematics Visualizer](https://tembrica.com/en/forward-kinematics-visualizer): Visualize serial robot arm kinematics interactively using Denavit–Hartenberg parameters.
- [Gear Ratio Calculator](https://tembrica.com/en/gear-ratio-calculator): Calculate gear ratios, RPM and torque for multi-stage gear trains used in robotics, RC vehicles and mechanisms.
- [Line-Follower Track Generator](https://tembrica.com/en/line-follower-track-generator): Design a closed-loop course, preview it on-screen, then print or download a tiled PDF across multiple A4/Letter pages.
- [LiPo Battery Calculator](https://tembrica.com/en/lipo-battery-calculator): Calculate pack voltage, energy, max discharge current and runtime for any LiPo battery configuration.
- [PID Tuning Simulator](https://tembrica.com/en/pid-tuning-simulator): Adjust Kp, Ki, Kd to see the step-response curve update in real time.
- [Quaternion & Rotation Converter](https://tembrica.com/en/quaternion-converter): Select an input format, enter values, and all other representations update live.
- [Robot ID Registry](https://tembrica.com/en/robot-registry): Register any robot and get a free unique Tembrica Robot ID (TRID), a public passport page and a lifecycle logbook. Free, open registry.
- [Robot Speed & Odometry Calculator](https://tembrica.com/en/robot-speed-calculator): Enter wheel diameter and RPM to get linear speed, km/h, mph, and odometry metrics instantly.
- [Robot Vacuum Error Codes](https://tembrica.com/en/robot-vacuum-error-codes): Search by error code or keyword — get the cause and fix steps instantly.
- [Serial Monitor](https://tembrica.com/en/serial-monitor): Connect Arduino, ESP32, or any serial device and monitor incoming data live in your browser.
- [Servo Torque Calculator](https://tembrica.com/en/servo-torque-calculator): Enter payload mass and lever length to calculate the required servo torque.
- [Stepper Motor Calculator](https://tembrica.com/en/stepper-motor-calculator): Configure stepper motor steps/mm for 3D printers, CNC machines, and robotics firmware.
- [URDF Viewer](https://tembrica.com/en/urdf-viewer): Visualise robot links, joints and meshes — articulate the kinematic chain live

## Samples & Test Files (10)

- [Codec Sample Pack](https://tembrica.com/en/codec-sample-pack): Download codec test files — H.264, H.265 HEVC, AV1, VP9, VP8 in MP4 and WebM. Verify your player and pipeline support with live browser probe.
- [Corrupted File Generator](https://tembrica.com/en/corrupted-file-generator): Generate corrupted test files for error-path QA — truncate, zero magic bytes, bit-flip, zero middle or rename extension. Browser-based.
- [Dummy File Generator](https://tembrica.com/en/dummy-file-generator): Generate dummy files of any size from 1 KB to 10 GB. Zero, random, text or pattern bytes, custom extension, instant browser download.
- [Sample Audio Generator](https://tembrica.com/en/sample-audio): Download or generate sample audio for testing — 1 kHz tone, pink noise, custom sine/white/pink at 44.1/48/96 kHz, 16/24-bit, mono/stereo WAV.
- [Sample Document Generator](https://tembrica.com/en/sample-document-pack): Generate sample documents in browser — CSV, JSON, XML, RTF, Markdown, TXT with deterministic rows. Custom row/column count up to 100 000.
- [Sample Video Generator](https://tembrica.com/en/sample-video): Download or generate sample video for player testing — 1080p / 4K H.264 MP4 catalogue plus on-the-fly WebM and MP4 via MediaRecorder.
- [Sine Sweep WAV Generator](https://tembrica.com/en/sine-sweep): Generate log or linear sine sweep WAV files for REW, ARTA and room measurement. 20 Hz–20 kHz, 44.1/48/96 kHz, 16/24-bit, full channel routing.
- [Test Image Generator](https://tembrica.com/en/test-image-pack): Generate test images for QA — colour bars, grayscale, gradient, checker, grid up to 4K. Export as PNG, JPEG or WebP with adjustable quality.
- [Test PDF Generator](https://tembrica.com/en/test-pdf): Generate test PDFs in your browser — lipsum text, multi-page sections, big table or blank. A4/Letter/Legal/A3, up to 500 pages, custom title.
- [TV Test Pattern Generator](https://tembrica.com/en/tv-test-pattern): TV calibration patterns for projectors and displays — SMPTE bars, PLUGE, grayscale, focus star, HDR window, overscan. PNG up to 8K plus MP4 loops.

## 3D printing (8)

- [Calibration Cube Generator](https://tembrica.com/en/3d-calibration-cube): XYZ cube, retraction tower and flow tower — parametric, export STL
- [3D Print Cost Calculator](https://tembrica.com/en/3d-filament-calculator): Filament + electricity + wear — drag in an STL or type the volume
- [Filament Length ↔ Weight Converter](https://tembrica.com/en/3d-filament-converter): 20+ material presets — PLA, PETG, ABS, TPU, Nylon, carbon-filled and more
- [G-code Viewer Online](https://tembrica.com/en/3d-gcode-viewer): Layer-by-layer toolpath, time and filament estimates
- [Gridfinity Bin & Baseplate Generator](https://tembrica.com/en/3d-gridfinity): Parametric bins and baseplates — export STL for any 3D printer
- [Lithophane Generator](https://tembrica.com/en/3d-lithophane-generator): Image → grayscale height map → STL — flat or curved
- [Photo to 3D Model Scanner](https://tembrica.com/en/3d-photo-to-model): AI depth or turntable silhouettes — export STL, slice and print
- [Temperature Tower Generator](https://tembrica.com/en/3d-temperature-tower): Parametric STL + G-code with M104 per segment — any printer, any filament

## Education (14)

- [World Alphabets](https://tembrica.com/en/alphabet): Interactive alphabet guide for 12 languages. Click any letter to hear its pronunciation. Learn mode + quiz mode.
- [Animal Vision Simulator](https://tembrica.com/en/animal-vision): Pick an animal and a source, then drag the slider to compare your vision with theirs.
- [EGE Score Calculator](https://tembrica.com/en/ege-calculator): Converts primary points to test scores using the official scales and helps you grade a mock exam by task and by the official FIPI criteria — the way an examiner does.
- [Graph paper](https://tembrica.com/en/graph-paper): Grid, millimetre, dots, isometric, staves and handwriting guides as PDF with exact millimetres and a printer calibration.
- [AI presentation maker for lessons](https://tembrica.com/en/lesson-maker): AI builds a lesson presentation from your topic: slides, lesson plan, handout and a narrated video. PowerPoint export with speaker notes.
- [Logic Games for Kids](https://tembrica.com/en/logic-trainer): Free adaptive logic puzzles for kids 5–12: patterns, odd-one-out, analogies, shapes, and deduction. Voice narration and a parent skill report.
- [Math Practice for Kids](https://tembrica.com/en/math-practice-kids): Pick a level, fill in the answers, and tap Check. Earn coins, open chests, and unlock new worlds.
- [Number to Words](https://tembrica.com/en/number-to-words): Spell numbers and amounts with real grammar — seven languages, currency, ordinals, cheques and batch mode.
- [Periodic table](https://tembrica.com/en/periodic-table): The periodic system, the solubility chart, the activity series of metals and a molar mass calculator on one page, with data from PubChem.
- [Printable Puzzle Maker](https://tembrica.com/en/puzzle-maker): Sudoku at 4×4, 6×6 and 9×9 with one verified solution and honest difficulty, plus word searches from your own list. Four to a page, PDF with answers.
- [Roman Numerals](https://tembrica.com/en/roman-numerals): Type either box to convert. Switch modes for dates, a Roman clock, lessons, or a quiz. The chart stays visible.
- [Schulte Tables](https://tembrica.com/en/schulte-table): Find the numbers in order without moving your eyes from the centre. A series of five grids gives you work efficiency, warm-up and stability.
- [Speed Reading Trainer](https://tembrica.com/en/speed-reading): Read one word at a time with an eye anchor, in chunks or by sentence — and measure how many words per minute you actually read.
- [Typing Trainer](https://tembrica.com/en/typing-trainer): Free typing trainer with adaptive lessons, code mode, finger heatmap and certificate. QWERTY, Dvorak, Colemak. 10 languages.

## Career (2)

- [Will AI Replace Your Job?](https://tembrica.com/en/ai-job-risk): Estimate the automation risk of any profession with multi-source 2026 data.
- [Career Test for Teens](https://tembrica.com/en/career-test): Free RIASEC career test for teenagers. Discover careers that fit your interests, with real pay, job growth and AI outlook for each match. Free.

## Console Tests (9)

- [Cloud Gaming Readiness](https://tembrica.com/en/cloud-gaming-readiness): Test your network and browser for xCloud, GeForce Now, PS Remote Play, Steam Link, Luna. Latency, bandwidth and codec check.
- [DualSense Tester](https://tembrica.com/en/dualsense-tester): Test PS5 DualSense controller in your browser via Web HID — sticks, analog triggers, buttons, touchpad, drift detection. Free.
- [Joy-Con Tester](https://tembrica.com/en/joy-con-tester): Test Nintendo Joy-Con stick drift, buttons, gyroscope and accelerometer in your browser via Web HID. No download. Free.
- [PS5 Browser Test](https://tembrica.com/en/ps5-browser-test): Test what the PS5 hidden browser supports — codecs, WebGL, WASM, Web HID and more. Free in-browser report from Tembrica.
- [Steam Deck Controls Test](https://tembrica.com/en/steam-deck-controls-test): Test Steam Deck sticks, triggers, buttons and gyroscope in your browser via the Gamepad and DeviceOrientation APIs. Free.
- [Steam Deck Screen Test](https://tembrica.com/en/steam-deck-screen-test): Find dead pixels and check color uniformity on the Steam Deck 7" 1280×800 screen. 8 fullscreen patterns, gamepad navigable.
- [Steam Deck Test](https://tembrica.com/en/steam-deck-test): Test Steam Deck browser features: GPU, RAM, codecs, WebGPU, Web HID, gamepad and FPS benchmark. Free in-browser report.
- [Xbox Browser Test](https://tembrica.com/en/xbox-browser-test): Test what the Xbox Series Edge browser supports — codecs, WebGL, WASM, Gamepad and more. Free in-browser report.
- [Xbox Controller Tester](https://tembrica.com/en/xbox-controller-tester): Test Xbox controller in your browser — sticks, triggers, buttons, dual-rumble vibration. Free Gamepad API diagnostic.

## Files & disks (21)

- [Illustrator files](https://tembrica.com/en/ai-open): Opens Adobe Illustrator files without Illustrator, including ones saved without PDF compatibility, and exports them to SVG and PNG.
- [BIN/CUE to ISO](https://tembrica.com/en/bin-cue-to-iso): Convert BIN/CUE to ISO online. Auto-detects MODE1/2 sector layouts, extracts CD-DA audio as WAV, parses multi-track cuesheets. In the browser.
- [DBF tables](https://tembrica.com/en/dbf-repair): Opens .dbf tables from dBASE, FoxPro and Clipper, repairs damaged ones, brings back deleted records and exports to CSV.
- [DBX folders](https://tembrica.com/en/dbx-reader): Opens Outlook Express folders without Outlook Express: lists the messages, shows each one, and saves them as EML or a whole folder as mbox.
- [Disk Image Inspector](https://tembrica.com/en/disk-image-inspector): Inspect ISO, VHD, VHDX, VMDK, QCOW2, DMG, E01 disk images. Parse MBR/GPT, detect filesystems, hex view, stream SHA-256.
- [Disk image recovery](https://tembrica.com/en/disk-recovery): Drop the image of the card or drive — .img, .dd, .bin, .raw.
- [DWG drawings](https://tembrica.com/en/dwg-viewer): Opens AutoCAD DWG drawings of every readable generation in your browser, shows them and saves them as DXF or SVG. No CAD to install.
- [DXF drawings](https://tembrica.com/en/dxf-repair): Opens DXF drawings without CAD, including truncated and damaged ones, shows them and exports to SVG or a rewritten DXF.
- [File Converter](https://tembrica.com/en/file-converter): Audio, video, images, PDF, archives, subtitles and data files — one tool detects what you dropped and shows every format it can become.
- [File diagnosis](https://tembrica.com/en/file-doctor): Drop the file that will not open — we walk its structure and tell you what is wrong with it.
- [ISO Creator](https://tembrica.com/en/iso-creator): Build ISO files from a folder in your browser. Joliet long names, hybrid USB MBR, streamed 8GB+ output via File System Access.
- [ISO Extractor](https://tembrica.com/en/iso-extractor): Extract ISO files online with UDF and Joliet support. Stream 16GB+ images, preview files in-tree, verify SHA-256 in your browser.
- [Failing drive rescue](https://tembrica.com/en/media-rescue): Choose the ailing folder, then a safe place for the survivors.
- [OneNote notes](https://tembrica.com/en/onenote-viewer): Reads OneNote sections in your browser: shows the note text, the authors and the dates, and saves everything as a plain text file.
- [Ransomware identifier](https://tembrica.com/en/ransomware-id): Drop the ransom note and one encrypted file — either alone also works.
- [RAW photo rescue](https://tembrica.com/en/raw-rescue): Drop the RAW file — .cr2, .cr3, .nef, .arw, .dng, .rw2, .orf, .raf.
- [Windows registry hives](https://tembrica.com/en/registry-viewer): Opens Windows registry hive files without Windows, shows keys and values, and recovers deleted keys from the hive's free space.
- [Secure USB Wipe](https://tembrica.com/en/secure-wipe): Overwrite files with random data before deletion — make recovery impossible. Works on USB drives, SD cards, and any folder. No software to install.
- [SQLite recovery](https://tembrica.com/en/sqlite-repair): Drop the database — .db, .sqlite, .sqlite3, .db3 or a message store.
- [USB Drive Not Recognized](https://tembrica.com/en/usb-drive-repair): Identify the real cause from the symptom and get the exact commands for your system.
- [ZX Spectrum tape](https://tembrica.com/en/zx-tape): ZX Spectrum tapes in your browser: TZX/TAP to audio for loading into a real Spectrum, cassette recordings back to TAP, tapes from your own BASIC.

## Religion (9)

- [Prayer Rope Counter](https://tembrica.com/en/chotki-counter): A counter for the Jesus Prayer on a prayer rope (chotki), with knot presets, cycle counts and memory for today and all-time.
- [Hijri Converter](https://tembrica.com/en/hijri-converter): Today's Islamic date, two-way date converter, and a monthly Hijri calendar with holidays.
- [Light a Candle Online](https://tembrica.com/en/memorial-candle): Light a virtual candle in memory of someone you love — add a name, dates, a photo and a few words. Candle, dua or quiet light.
- [Memorial Days](https://tembrica.com/en/memorial-days): Work out the 3rd, 9th and 40th day, half-year and anniversary from the date of death with church transfers, plus the memorial Saturdays and Radonitsa for any year.
- [Prayer Times](https://tembrica.com/en/prayer-times): Five daily prayers with multiple calculation methods, Asr madhab choice and a live countdown.
- [Qaza Namaz](https://tembrica.com/en/qaza-namaz): Work out how many obligatory prayers you have missed and track making them up, day by day — with madhhab support.
- [Qibla Finder](https://tembrica.com/en/qibla-finder): Live mobile compass, exact bearing to the Kaaba, and distance to Mecca.
- [Digital Tasbih](https://tembrica.com/en/tasbih-counter): A digital tasbih with target presets, multi-dhikr tracker and progress memory.
- [Zakat Calculator](https://tembrica.com/en/zakat-calculator): Enter your assets and liabilities in any currency; the calculator checks Nisab and computes 2.5%.

## Entertainment (10)

- [Bubble Wrap](https://tembrica.com/en/bubble-wrap): Click or drag across the sheet to pop bubbles. They grow back, so the popping never ends.
- [Funny Faces](https://tembrica.com/en/funny-faces): Build silly faces in your browser. Mix doodle eyes, noses, mouths, hats and roll the dice for random combinations. Print, save, share. Free.
- [Lie Detector Game](https://tembrica.com/en/lie-detector-game): A playful lie detector game: a prank truth/lie scanner, a voice nervousness meter and party questions. Not a real test — just for fun. Free.
- [Natal chart](https://tembrica.com/en/natal-chart): Birth chart from date, time and place: ascendant, houses, aspects. Historical time zones and an honest error bar on your birth time.
- [Night Sky](https://tembrica.com/en/night-sky): Live night sky — Sun, Moon, planets and constellations in real positions for Moscow. Auto-updates every 5 minutes.
- [Falling Sand](https://tembrica.com/en/sand-game): Pick an element and paint on the canvas. Watch sand fall, water flow and fire spread.
- [Spin the Wheel](https://tembrica.com/en/spin-wheel): Add your entries, then spin the wheel to pick a random winner.
- [Birth Chart Compatibility](https://tembrica.com/en/synastry): Compare two birth charts: cross-aspects, house overlays, and an honest account of which conclusions survive an imprecise birth time.
- [Tarot Reading](https://tembrica.com/en/tarot-reading): Online tarot with the Rider-Waite-Smith deck: 6 spreads, upright and reversed meanings, voice reading and a journal. Free.
- [Wishing Star](https://tembrica.com/en/wishing-star): Send a named star to the shared sky. For hope, gratitude or in memory of someone. Your wish stays — forever, in its own coordinates.

## QR & barcodes (5)

- [Barcode Generator](https://tembrica.com/en/barcode-generator): Create barcodes in 16 formats. Download crisp SVG or PNG, or print directly.
- [Barcode Scanner](https://tembrica.com/en/barcode-scanner): Scan any barcode or QR code from camera or uploaded image. Get product info, links, and more.
- [QR Code Generator](https://tembrica.com/en/qr-code): Generate customizable QR codes for URLs, text, WiFi, vCard, email, SMS, phone, WhatsApp, and locations.
- [QR file transfer](https://tembrica.com/en/qr-file-transfer): One screen streams the file as QR codes, the other device reads them with its camera.
- [QR Code Scanner](https://tembrica.com/en/qr-scanner): Scan a QR code from a screenshot, photo or camera. Reads Wi-Fi, links and contacts, handles several codes at once, and flags risky links.

## Construction & DIY (15)

- [Concrete Calculator](https://tembrica.com/en/concrete-calculator): Enter the dimensions of a slab, footing or round column and get the concrete volume and the number of pre-mix bags.
- [Drill Bit Gauge](https://tembrica.com/en/drill-bit-gauge): Measure a drill bit on your calibrated screen, or print a true-to-size gauge — then read its metric and inch size.
- [Fence Calculator](https://tembrica.com/en/fence-calculator): Enter the fence length and post spacing to get the posts, sections, rails and pickets you need.
- [Hex Key Gauge](https://tembrica.com/en/hex-key-gauge): Measure a hex key on your calibrated screen, or print a true-to-size gauge — then read its metric or SAE size.
- [Lumber Calculator](https://tembrica.com/en/lumber-calculator): Enter the board thickness, width, length and quantity to get the board feet per board, the total and the cost.
- [Nail Gauge](https://tembrica.com/en/nail-gauge): Measure a nail on your calibrated screen, or print a true-to-size gauge — then read its penny size, length and shank thickness.
- [O-Ring Sizer](https://tembrica.com/en/o-ring-sizer): Measure an O-ring on your calibrated screen, or print a true-to-size sizer — then read its inner diameter and cross-section.
- [Paint Calculator](https://tembrica.com/en/paint-calculator): Enter the room size, the number of coats and the paint coverage, and get the litres or gallons to buy.
- [Renovation cost estimate](https://tembrica.com/en/repair-estimate): Enter your rooms — wall, floor, ceiling areas and the skirting run are worked out for you. Tick the jobs, put in your own prices or the ones from the quote you were sent, and see the total next to the standard labour hours.
- [Renovation Work Norms](https://tembrica.com/en/repair-norms): Pick a job and see what it includes under the Russian state construction norms, how many man-hours it should take and how much material your volume needs.
- [Screw Gauge](https://tembrica.com/en/screw-gauge): Measure a screw on your calibrated screen, or print a true-to-size paper gauge — then read its diameter, thread pitch and length.
- [Stair Calculator](https://tembrica.com/en/stair-calculator): Enter the floor-to-floor height and get the riser height, tread depth, stair angle and stringer length, with comfort and code checks.
- [Thread Gauge](https://tembrica.com/en/thread-gauge): Measure ten threads on a calibrated screen to get the pitch, TPI and matching sizes. The 1:1 printable sheet adds pitch combs, radius arcs and a feeler table.
- [Tile Calculator](https://tembrica.com/en/tile-calculator): Enter the room size and the tile size, add a waste margin, and get the number of tiles and boxes to buy.
- [Wallpaper Calculator](https://tembrica.com/en/wallpaper-calculator): Enter the room size, the roll size and the pattern repeat, and get the number of rolls to buy.

## Household Tools (8)

- [Baking Pan Converter](https://tembrica.com/en/baking-pan-converter): Pick the pan a recipe was written for and the pan you want to use — get the factor to scale the recipe by.
- [Power Outage Planner](https://tembrica.com/en/blackout-planner): How long the fridge, the freezer, the heat, the power bank and the water last in your flat, and what is dangerous to heat with.
- [Cleaning Schedule](https://tembrica.com/en/cleaning-schedule): Create a personalized cleaning schedule for your home with tasks and time estimates.
- [Kitchen Converter](https://tembrica.com/en/kitchen-converter): Convert cooking measurements with ingredient-specific accuracy.
- [Needle & Hook Gauge](https://tembrica.com/en/needle-gauge): Measure a needle or hook on your calibrated screen, or print a true-to-size gauge — then read its mm, US and UK size.
- [Oven Temperature Converter](https://tembrica.com/en/oven-temperature-converter): Enter a temperature in °C, °F or gas mark and get every other oven setting at once.
- [Recipe Scaler](https://tembrica.com/en/recipe-scaler): Paste a recipe, change the serving size, get rescaled ingredients instantly.
- [Spaghetti Portion Measure](https://tembrica.com/en/spaghetti-measure): Print this 1:1 card, hold a bundle of dry spaghetti against a circle, and serve the exact portion every time.

## Calculators (8)

- [Calculator](https://tembrica.com/en/calculator): Basic and scientific modes, voice readout in 10 languages, large buttons and a running paper-tape — built to be easy for seniors, children and everyone else.
- [Clothing Size Converter](https://tembrica.com/en/clothing-size-converter): Pick a category and your size in one region to see the matching size everywhere else.
- [Depth of Field Calculator](https://tembrica.com/en/depth-of-field-calculator): Set your sensor, focal length, aperture and focus distance to see the depth of field and focus limits.
- [GPA Calculator](https://tembrica.com/en/gpa-calculator): Add each course with its letter grade and credit hours to get your credit-weighted GPA.
- [ND Filter Calculator](https://tembrica.com/en/nd-filter-calculator): Pick the exposure without a filter and the ND filter you are using to get the corrected shutter speed.
- [Percentage Calculator](https://tembrica.com/en/percentage-calculator): Percent of a number, percent change, discount, tip, VAT, markup
- [Print Size Calculator](https://tembrica.com/en/print-size-calculator): Enter the image pixel dimensions to find the print size at a chosen DPI, or the DPI at a target size.
- [Tire Size Calculator](https://tembrica.com/en/tire-size-calculator): Enter your original and new tire sizes to see the diameter change and how far the speedometer will be off.

## Jewelry (5)

- [Stone weight in a jewelry piece](https://tembrica.com/en/gemstone-weight-calculator): Estimate the weight of set stones from their measurements: carats, grams, net metal weight. Diamond, cubic zirconia, sapphire. Online, no install.
- [Ring Size Calculator](https://tembrica.com/en/ring-size-calculator): Pick a method below. Everything runs in your browser.
- [Watch Battery Finder](https://tembrica.com/en/watch-battery-finder): Find the exact battery for your watch by model.
- [Watch Size Calculator](https://tembrica.com/en/watch-size-calculator): Wrist → ideal case diameter, lug-to-lug, strap width
- [Watch Strap Gauge](https://tembrica.com/en/watch-strap-gauge): Measure the lug width on your calibrated screen, or print a true-to-size gauge — then order the right replacement strap.

## PDF Tools (25)

- [Page numbers](https://tembrica.com/en/add-page-numbers): Number PDF pages and see the number on your own page before you download. Nine positions, custom pattern, roman front matter, facing pages.
- [Add Watermark](https://tembrica.com/en/add-watermark): Stamp text or a logo on a PDF. See it on your own page before downloading: drag the mark, put it over or under the text.
- [PDF Compression](https://tembrica.com/en/compress-pdf): Shrinks a PDF while keeping text, fonts and bookmarks — only the images get recompressed. Includes a fit-under-a-size mode. Runs in your browser.
- [Crop PDF](https://tembrica.com/en/crop-pdf): Trim white borders from a PDF. Auto-detect ink, set margins in mm/in/pt, preview live. Vector output, in the browser.
- [Document scanner](https://tembrica.com/en/document-scanner): Photograph a page with your phone — the edges are found for you, the perspective is straightened, the shadows go, and out comes a PDF that will be accepted in place of a scan.
- [Extract PDF Pages](https://tembrica.com/en/extract-pages): Pull selected pages from a PDF into a single new file. Pick by number, by range, or by clicking thumbnails. Bookmarks survive.
- [HTML to PDF](https://tembrica.com/en/html-to-pdf): Convert HTML to PDF in the browser. Paste source, upload .html, or fetch a URL. A4, Letter, custom margins.
- [JPG to PDF](https://tembrica.com/en/jpg-to-pdf): Convert JPG, PNG, WebP, AVIF or HEIC images to one PDF. Drag to reorder, rotate, set page size + margins.
- [Merge PDF](https://tembrica.com/en/merge-pdf): Combine multiple PDFs into one file. Reorder pages, pick page ranges per file, rotate, add bookmarks. Fast, in your browser.
- [PDF Editor](https://tembrica.com/en/pdf-editor): PDF editor online: change the text already in the document, sign it, fill a form, white out what should go, reorder pages. All in one pass.
- [PDF repair](https://tembrica.com/en/pdf-repair): Drop the PDF your reader refuses to open.
- [PDF to Excel](https://tembrica.com/en/pdf-to-excel): Pull tables out of PDFs and scans into XLSX. The grid is shown before download, and numbers and dates arrive as numbers and dates.
- [PDF to JPG](https://tembrica.com/en/pdf-to-jpg): Convert PDF pages to JPG, PNG or WebP images. Pick DPI, page range and quality. Multi-page output as a ZIP. In the browser.
- [PDF to Word](https://tembrica.com/en/pdf-to-word): Convert PDF to a .docx Word file in the browser. Heading detection, page breaks. Editable text.
- [Protect PDF](https://tembrica.com/en/protect-pdf): Add an AES-256 password and copy/print/edit restrictions to a PDF. Real encryption that every reader from 2017+ understands.
- [Redact PDF](https://tembrica.com/en/redact-pdf): Black out data in a PDF: type a name and cover it on every page. Redacted text is removed from the file, not hidden under a box.
- [Remove Pages from PDF](https://tembrica.com/en/remove-pages): Delete unwanted pages from a PDF. Click thumbnails or type a range. Blank-page sweep included. No size cap.
- [Reorder PDF Pages](https://tembrica.com/en/reorder-pages): Rearrange or remove pages of a PDF with a drag-and-drop visual editor. Preserves bookmarks and page labels. Browser-only, free.
- [Rotate PDF](https://tembrica.com/en/rotate-pdf): Rotate PDF pages 90, 180 or 270 degrees per page or all at once. Preserves bookmarks and page labels. In the browser.
- [Sign PDF](https://tembrica.com/en/sign-pdf): Add your signature to a PDF online: draw, type or upload it, drop it on the page, add the date and download the signed file. In your browser.
- [Split PDF](https://tembrica.com/en/split-pdf): Split a PDF by pages, ranges, every N pages, or bookmarks. Preserves outlines and page labels.
- [Unlock PDF](https://tembrica.com/en/unlock-pdf): Remove the password from a PDF you can open. Decrypts, drops owner restrictions, lets you copy and print. No signup.
- [Verify PDF](https://tembrica.com/en/verify-pdf): Check whether a signed PDF has been altered. Upload the PDF and its verification seal to confirm the file is unchanged. In your browser. Free.
- [Word to JPG and PNG](https://tembrica.com/en/word-to-jpg): Word to JPG and PNG converter: every .docx page becomes a separate image. Up to 300 DPI, pick the pages you need. Runs in your browser.
- [Word to PDF](https://tembrica.com/en/word-to-pdf): Convert .docx to PDF in the browser. A4, Letter, three quality levels, custom margins. No installation.

## Biology & Microscopy (4)

- [Cell Counter](https://tembrica.com/en/cell-counter): Automatic cell counting and microscopy image analysis — free, in your browser.
- [DNA Analyzer](https://tembrica.com/en/dna-analyzer): Complete DNA/RNA sequence analysis toolkit — free, in your browser.
- [Gel Analyzer](https://tembrica.com/en/gel-analyzer): Free browser-based gel electrophoresis image analyzer with 20+ built-in ladders.
- [Spectrogram Lab](https://tembrica.com/en/spectrogram-lab): Analyze sonograms and spectrograms of wildlife sounds: birds, bats, whales, frogs, insects.

## Russian language (8)

- [Feminine job-title dictionary](https://tembrica.com/en/feminitives): Look up the feminine form of any profession in 6 languages — Russian, German, French, Spanish, Portuguese, Arabic — with honest usage tags. Free.
- [Declension by Case](https://tembrica.com/en/russian-cases): Enter a noun and get it in all six cases, singular and plural, with stress marks and audio.
- [Russian cursive](https://tembrica.com/en/russian-cursive): See how any Russian letter or word is written in cursive, play the writing animation and print a tracing worksheet.
- [Russian name declension](https://tembrica.com/en/russian-name-declension): Enter a Russian full name — the tool declines it through all six cases with the correct gender, tells you whether the surname declines at all, and builds the patronymic from a given name.
- [Russian Stress Marks](https://tembrica.com/en/russian-stress): Automatically place stress marks on Russian text, pick the variant for homographs, and restore the letter ё.
- [Russian–Latin Transliterator](https://tembrica.com/en/russian-transliteration): Convert Cyrillic to Latin in 9 standards side by side — passport, GOST, ICAO, BGN/PCGN and more. Compare them, reverse the conversion, export a PDF name card.
- [Russian Vocabulary Test](https://tembrica.com/en/russian-vocabulary-test): An adaptive test estimates how many Russian words you know from your "know / don't know" answers.
- [Yoficator](https://tembrica.com/en/yofikator): Automatically restore the letter ё in Russian text: clear cases instantly, ambiguous ones are yours to choose.

## Travel (6)

- [Distance Between Cities](https://tembrica.com/en/distance-between-cities): Measure the straight-line distance between two cities, with bearing, midpoint, flight time and a map.
- [Flight time](https://tembrica.com/en/flight-time): How long the flight takes between two cities and what time you land in local time. Accounts for climb, descent and the jet stream.
- [Flight Tracker](https://tembrica.com/en/flight-tracker): Track aircraft in real time on a live map and find any flight by number — with altitude, speed and aircraft type. Free, in your browser.
- [Schengen 90/180 Calculator](https://tembrica.com/en/schengen-calculator): Add your Schengen trips — see days used, days left and your must-leave date.
- [Travel Phrasebook](https://tembrica.com/en/travel-phrasebook): Offline travel phrasebook with emergency and disaster phrases in 20 languages, audio, romanization and local emergency numbers. Free, in your browser.
- [Visa-Free Countries by Passport](https://tembrica.com/en/visa-free-checker): Pick your passport — we show every destination, sorted by entry requirement.

## Documents (11)

- [Microsoft Access Database Recovery](https://tembrica.com/en/access-repair): Pulls tables and records out of damaged .accdb and .mdb files, even when the header or catalog is destroyed. Exports to Excel, CSV, JSON and SQL.
- [Birth Poster](https://tembrica.com/en/birth-poster): A birth details poster: name, date, weight, height and photo. Ready A4 layout, print and a 300 dpi file, with a life-size footprint frame.
- [Certificates and diplomas](https://tembrica.com/en/certificate-maker): Build an award document and print it — one, or a whole class at once.
- [Creation Date Certificate](https://tembrica.com/en/creation-certificate): Create a tamper-proof certificate that timestamps when your file existed — RFC 3161 trusted timestamp, verifiable by anyone. Free.
- [Mail archive reader](https://tembrica.com/en/mail-archive): Drop the .mbox or .eml file — a whole Takeout export is fine.
- [OCR Text Extractor](https://tembrica.com/en/ocr-text-extractor): Drop an image, PDF or a full folder — get editable text, Word, Excel or searchable PDF.
- [Office document repair](https://tembrica.com/en/office-repair): Drop the document Word, Excel or PowerPoint refuses to open.
- [Office unprotect](https://tembrica.com/en/office-unprotect): Drop the Excel, Word or PowerPoint file that will not let you edit it.
- [PST and OST archives](https://tembrica.com/en/pst-viewer): Opens .pst and .ost archives without Outlook, damaged ones included. Reads mail, contacts and calendar, and exports them.
- [Stamp Maker](https://tembrica.com/en/stamp-maker): The stamp maker builds the seal from your details: pick the kind — corporate seal, notary, Ltd, office stamp, address stamp or your own shape — type the name and the numbers, and the layout arranges itself: the name around the ring, the registration line on the second ring, the short name in the middle. Out come a transparent PNG for documents, an SVG or PDF with the text as outlines for the stamp maker's workshop, and a realistic inked impression for scans.
- [Unsaved document recovery](https://tembrica.com/en/unsaved-doc): Drop the .asd, .wbk or ~WRD file — or the whole AutoRecover folder.

## Finance (4)

- [Currency Converter](https://tembrica.com/en/currency-converter): Live mid-market rates, cached 10 minutes to stay fast. Pick a pair and start typing.
- [Household Budget](https://tembrica.com/en/household-budget): Track household income and expenses with visual charts and 50/30/20 analysis.
- [Loan calculator](https://tembrica.com/en/loan-calculator): Loan and mortgage calculator: amortization by actual days, overpayment, effective rate with fees, extra payments, refinancing, savings and tax refund.
- [Penalty & Interest Calculator](https://tembrica.com/en/penalty-calculator): Late-payment penalty & interest calculator: contractual daily/annual rate or Russia Art. 395 key rate, period breakdown, partial payments. Free.

## SSL & certificates (8)

- [Let’s Encrypt troubleshooter](https://tembrica.com/en/acme-troubleshooter): Find out why certbot cannot validate your domain. Checks DNS, the challenge path over HTTP and your CAA records from outside.
- [SSL certificate decoder](https://tembrica.com/en/cert-decoder): Read any X.509 certificate: expiry, SAN, issuer, key strength, chain. Explains what is wrong, not only what the fields say.
- [Certificate chain fixer](https://tembrica.com/en/chain-fixer): Paste your certificates and get a correctly ordered chain file. Finds the missing intermediate and downloads it for you.
- [CSR generator](https://tembrica.com/en/csr-generator): Create a certificate signing request and its private key in your browser. RSA or ECDSA, every domain in the SAN, no openssl needed.
- [Key and certificate matcher](https://tembrica.com/en/key-cert-matcher): Check whether a private key belongs to a certificate or CSR. Works with RSA and EC, encrypted keys and .pfx bundles.
- [Certificate format converter](https://tembrica.com/en/pem-converter): Convert certificates and keys between PEM, DER, PKCS#8, PKCS#1 and PFX. Opens old Windows .pfx exports other tools reject.
- [Self-signed certificate generator](https://tembrica.com/en/self-signed-cert): Make an HTTPS certificate for localhost or an internal host. Builds a local CA so the browser warning goes away for good.
- [SSL Checker](https://tembrica.com/en/ssl-checker): Enter a domain to inspect its HTTPS certificate: who issued it, when it expires, whether the chain is complete and which TLS versions the server accepts.

## Archives (3)

- [Archive Maker](https://tembrica.com/en/archive-creator): Pack files and folders into ZIP, 7z, TAR.GZ or TAR.XZ: compression level, AES-256 password, split into volumes. Online, no install.
- [Archive Extractor](https://tembrica.com/en/archive-extractor): Open and extract ZIP, RAR, 7z, TAR and 70+ archive formats online, including password-protected ones. Preview files in your browser.
- [Archive Repair](https://tembrica.com/en/archive-repair): Diagnose and repair damaged ZIP, RAR, 7z and TAR archives. Finds why the archive will not open and pulls out the files that survived.

## World languages (2)

- [Indonesian Morphology](https://tembrica.com/en/indonesian-morphology): Break any Indonesian word into its root (kata dasar) and affixes — prefix, infix, suffix. Free, in your browser.
- [Portuguese cursive](https://tembrica.com/en/portuguese-cursive): See how any letter or word is written in Brazilian school cursive (letra cursiva), play the stroke animation and print a tracing worksheet.

## Sea & navigation (3)

- [Small-craft skipper practice test](https://tembrica.com/en/gims-test): The official EMERCOM question list — 1,221 questions with answers by vessel type and navigation area, plus a ticket in the order No. 90 format.
- [Sea distance between ports](https://tembrica.com/en/sea-route): A route over water between any two ports: nautical miles, passage time, fuel. Computed in your browser, with canal options and no limits.
- [Tide Times](https://tembrica.com/en/tides): High and low water times for any coastal place, a tide curve two weeks ahead and under-keel clearance. Computed in your browser, works offline.

## Informational Pages

- [About](https://tembrica.com/en/about): About Tembrica, mission, supported formats, and technology
- [Privacy Policy](https://tembrica.com/en/privacy): How uploads and personal data are handled
- [Terms of Service](https://tembrica.com/en/terms): Usage terms for the service
- [Contact](https://tembrica.com/en/contact): Email support and FAQ
- [Sitemap](https://tembrica.com/en/sitemap): Complete list of all tools and pages
- [What's new](https://tembrica.com/en/whats-new): New tools and changes, by date
- [Limits and Premium](https://tembrica.com/en/premium-limits): Per-tier daily limits — the numbers are derived from configuration, not retyped here
- [Who receives content](https://tembrica.com/en/ai-providers): Third parties that receive user material
- [Request a Tool](https://tembrica.com/en/request-tool): Suggest a new tool

## Technical Details

- **Processing**: Most tools use FFmpeg compiled to WebAssembly or the Web Audio API for in-browser processing
- **Server fallback**: Some heavy operations are processed server-side via Rust and Go microservices
- **Supported audio formats**: 3GP, 8SVX, AAC, AC3, AIFF, ALAC, AMR, APE, AU, AVI, AWB, CAF, CDDA, DTS, EAC3, F32LE, FLAC, GSM, M4A, M4R, MKA, MKV, MMF, MOV, MP2, MP3, MP4, OGA, OGG, OPUS, PCM, RA, RAW, S16LE, SHN, SND, SPX, TAK, TS, TTA, VOC, WAV, WEBM, WMA, WV
- **Video output formats**: AVI, MKV, MOV, MP4, WebM
- **Processing locality**: Most tools process in the browser via WebAssembly; files sent for server-side processing are deleted after the job completes
- **Languages**: English (en), Russian (ru), Korean (ko), Arabic (ar), Indonesian (id), Portuguese (Brazil) (pt), German (de), Spanish (es), French (fr), Ukrainian (uk)
- **Localized URLs**: `https://tembrica.com/{locale}/...`
- **Access**: Most tools work without an account; some have daily limits, and certain features are part of the Premium plan