Tembrica Online Tools — Page 7

Electronics Calculators & Tools

Circuit Simulator
Build and simulate electronic circuits in your browser: transistors, MOSFET, logic gates, an oscilloscope and a smart block. Real V/I readouts.
Resistor Color Code Calculator
Decode resistor color bands to value or find colors by resistance. Supports 4/5/6 bands, tolerance, E-series. Interactive SVG. Free.
SMD Code Decoder
Decode SMD resistor and capacitor marking codes. Supports 3-digit, 4-digit, and EIA-96 systems. Reverse lookup by value. Free.
Capacitor Code Decoder
Decode 3-digit capacitor codes to pF/nF/µF values and back. Supports voltage ratings, tolerance codes, ceramic/film/electrolytic. Free.
555 Timer Calculator
Calculate 555 timer frequency, duty cycle, and component values. Astable & monostable modes, waveform preview, reverse calculation. Free.
Wire Gauge Calculator (AWG)
Calculate wire gauge by current and distance. AWG/mm² converter, voltage drop, ampacity tables, copper/aluminum. Free.
PCB Trace Width Calculator
Calculate PCB trace width by current using IPC-2221. Internal/external layers, voltage drop, resistance, copper weight presets. Free.
Voltage Divider Calculator
Calculate voltage divider output with R1/R2, load effects, E24 matching, tolerance range, power dissipation. Interactive schematic. Free.
LED Resistor Calculator
Calculate the resistor needed for any LED. Supply voltage, LED color presets, series/parallel arrays, power warnings, E24 matching. Free.
Ohms Law Calculator
Calculate voltage, current, resistance, and power with interactive Ohm's Law wheel. Visual circuit diagram, unit auto-conversion, presets. Free.
Battery Identifier
Identify an unknown battery from its size: AA, AAA, CR2032, 18650, LR44 and more. Printable 1:1 gauge plus screen ruler. Free.
Breadboard Simulator
A virtual solderless breadboard in your browser: plug in parts, run jumper wires, and the circuit really computes. Strip-highlight teaching mode.
Perfboard Layout
Lay out a solder perfboard or stripboard: place parts, draw traces, check the circuit before you pick up the iron. Runs in your browser.

Image Tools

Social Media Photo Resizer
Resize photos for Instagram, TikTok, Facebook, YouTube, and 8 more platforms. Smart crop, blur background fill, batch all sizes, ZIP download. Free.
HEIC to JPG Converter
Convert HEIC to JPG, PNG, or WebP in your browser. Batch 100+ files, auto-rename by date, quality slider. Free, private.
Photo Repair
Fix corrupted JPEG, repair scratches, denoise old scans, recover broken photos. Diagnose, file-level repair, AI restore — all in your browser. Free.
Photo Watermark
Batch photo watermarking with text, logo, diagonal tiles and Content Credentials. Works in your browser, no account, no limits.
Photo Colorizer
Colorize black-and-white photos with AI in your browser. Film presets, skin-tone, before/after slider. No signup, no watermark.
Verify Photo Credentials
Verify that a photo was signed by Tembrica Photo Watermark: drop the JPEG, read the XMP credential, check the signature.
AI Photo Enhancer & Upscaler
Enhance and upscale photos 2× or 4× with AI — increase resolution without losing quality, sharpen and boost contrast. In your browser, free.
Screenshot Tool
Take screenshots, annotate with arrows, text and shapes, blur sensitive areas, crop and export as PNG, JPG or WebP. Free.
Thumbnail Maker
Design video thumbnails and social covers in your browser. Bold outline text, photos, platform presets, photo tweaks, true-resolution export. Free.
Face Swap
Swap the faces of two people in one photo. Auto-detects and aligns both faces, with manual fine-tuning. Free, in your browser.
Document photo
Free passport, visa and green-card photo maker: auto-fits your face to size, swaps the background, checks compliance and prints. In-browser.
WEBP to JPG Converter
Convert WEBP images to JPG right in your browser: batch, transparency background choice and quality control. Animated WEBP exports every frame.

Clocks & Timers

Countdown to Date
Free countdown timer to any event: wedding, birthday, New Year, deadline. 4 themes, full-screen, shareable link. Free, in-browser.
Online Clock
Free online clock with 6 types: digital, analog, Roman numeral, binary, sundial, and flip. Learn to read each clock. Timezone support. Free.
Online Chess Clock
Free online chess clock for two players on one device: Bullet, Blitz, Rapid, Classical presets + Fischer, Bronstein, delay. Free, in-browser.
Watch Battery Finder
Watch battery finder: search Casio, Seiko, Citizen, Timex by model → exact battery (CR2016, SR626SW, etc.) + full size chart. Free.
Time Blindness Helper
Free visual time awareness tool for ADHD time blindness. See elapsed time, remaining time, and countdowns with color-coded visual representation.
Hourglass Timer
Hourglass timer with realistic flowing sand physics. Set any duration, flip to restart, focus and meditation presets. Free, in your browser.
Military Time Converter
Free military time converter: 24-hour ↔ 12-hour AM/PM with live sync, batch mode and reference chart. Free, in-browser.
Moment of Silence
Free moment of silence timer with virtual candle, ambient sounds, and personalization. Honor someone's memory in your browser.
Online Stopwatch
Free online stopwatch with milliseconds, laps, splits, sparkline, CSV export and shareable link. Wake lock, voice cue, works offline.
Kitchen Timer
Free online kitchen timer with up to 6 simultaneous timers. Presets for eggs, pasta, rice, meat, baking. Sound alerts. Free.
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.
Online Timer
Free online timer with multiple labeled countdowns, Pomodoro and HIIT interval modes, fullscreen and alarm sounds. Works right in your browser.