Tembrica Online Tools — Page 10

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.

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.

Adaptive English level test: vocabulary, grammar, reading and listening. Get your CEFR level with IELTS and TOEFL equivalents. Free, no signup.

A new English word each day with translation, meaning, examples and audio. Save and review words with spaced repetition. Free, in your browser.

Count the syllables in any English word or text. Dictionary-accurate, with a poetry mode for haiku. Free, in your browser.

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.

Learn English grammar by CEFR level A1–C2. Free course with clear lessons, exercises and progress tracking, in your browser.

Listen to graded English sentences and type what you hear. Word-by-word error highlighting, A1–C2 levels, adjustable speed. Free, in the browser.

Hear an English word and spell it. Four difficulty tiers, example sentences, letter-by-letter error marking and a streak counter. Free.

Estimate how many English words you know. A quick, science-based vocabulary size test with a CEFR estimate. Free, no sign-up.

Paste a word list and build a real Anki .apkg deck — with IPA, audio and a built-in study mode. Free, in your browser.

Train your ear on tricky English sounds — ship vs sheep, light vs right. A minimal pairs listening drill, in your browser.

Generate PGP / OpenPGP keys (RSA, Curve25519) in your browser. Encrypt, decrypt, sign and verify. Works with GnuPG, Thunderbird, ProtonMail.

Generate TOTP secrets for two-factor authentication. Live 6-digit code, QR for Google Authenticator / Authy / Aegis, RFC 6238 compliant.

Password generator with strength meter, pronounceable mode, pattern syntax, bulk export. Cryptographically secure via Web Crypto API.

Memorable passphrase generator using diceware-style word selection. 2048-word list, configurable separators, capitalization, and live entropy.

Test your password strength with Dropbox's zxcvbn engine. Real entropy estimate, crack-time scenarios and dictionary-attack warnings.

Check if your password appears in known data breaches using Have I Been Pwned's k-anonymity API. Fast, free, no account needed.

Decode a Google Authenticator / Authy QR screenshot back into its TOTP secret. Migrate to Aegis, 1Password or any other app. Runs in your browser.

Open a KeePass .kdbx database in your browser. View entries, export to JSON / CSV, no installation. KDBX4 and KDBX3 supported.

Convert password vault exports between Bitwarden JSON, KeePass, Chrome, Firefox, 1Password and LastPass CSV. Runs in your browser, no installation.

Split a secret into N shares where any K of them reconstruct it. Browser implementation over GF(256) for master passwords and seed phrases.

Audit an exported password vault (Bitwarden, KeePass, Chrome, Firefox, 1Password). Flags weak, reused and breached passwords using HIBP k-anonymity.

Share a secret via an encrypted link. AES-GCM 256-bit, decryption key lives in the URL fragment. No account, no database.

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.

Download or generate sample video for player testing — 1080p / 4K H.264 MP4 catalogue plus on-the-fly WebM and MP4 via MediaRecorder.

Generate dummy files of any size from 1 KB to 10 GB. Zero, random, text or pattern bytes, custom extension, instant browser download.

TV calibration patterns for projectors and displays — SMPTE bars, PLUGE, grayscale, focus star, HDR window, overscan. PNG up to 8K plus MP4 loops.

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.

Generate test images for QA — colour bars, grayscale, gradient, checker, grid up to 4K. Export as PNG, JPEG or WebP with adjustable quality.

Generate corrupted test files for error-path QA — truncate, zero magic bytes, bit-flip, zero middle or rename extension. Browser-based.

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.

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.

Generate sample documents in browser — CSV, JSON, XML, RTF, Markdown, TXT with deterministic rows. Custom row/column count up to 100 000.

Free recipe scaler. Paste ingredients, change servings — quantities adjust automatically with smart fractions. Free.

Free cleaning schedule generator. Select rooms, assign tasks, set frequency. Print checklist or track progress. Free.

Free kitchen unit converter with ingredient density. Convert cups to grams, tablespoons to ml, °C to °F. 50+ ingredients. Free.

Free household budget tracker. Track income, expenses by category, view charts, analyze spending with 50/30/20 rule. Free.

Identify any screw or bolt: diameter, thread pitch and length. Printable 1:1 screw gauge plus a calibrated on-screen ruler. Free.

Convert oven temperature between °C, °F, gas mark and fan-oven settings. Get all four from one value, with an oven-heat description. Free.

Identify an Allen / hex key size — metric and SAE inch. Printable 1:1 hex gauge plus a calibrated on-screen ruler. Free.

Swap a recipe between round, square and rectangular baking pans. Get the recipe scaling factor from the pan areas. Free.

Identify an O-ring: inner diameter and cross-section, with the metric or AS568 family. Printable 1:1 sizer plus screen ruler. Free.

Print a true-to-size dry spaghetti portion measure. Hold a bundle to the circle for 1, 2, 3 or 4 servings. Free printable.

Identify a nail: get its penny size, length and shank thickness. Printable 1:1 nail gauge plus a calibrated screen ruler. Free.

Identify an unmarked drill bit: get its metric and fractional-inch size. Printable 1:1 drill gauge plus on-screen ruler. Free.

Register any robot and get a free unique Tembrica Robot ID (TRID), a public passport page and a lifecycle logbook. Free, open registry.

Calculate ISO 13855 minimum protective separation distance for collaborative robots. Enter K, Tr, Ts, and C to get S instantly. Free.

Tune PID controller gains interactively. Step-response plot, live metrics, Ziegler–Nichols auto-tune, presets. Free.

Calculate LiPo pack voltage, energy, max discharge current and flight runtime for drones, RC cars and robots. Free.