Free tools that respect your privacy

No sign-up, no uploads. Every tool runs right in your browser. Free, anonymous, and privacy-first: test your webcam, microphone, keyboard, and more.

100% free
No sign-up
Runs on your device

Meeting tools

Check your gear before a video call. Test your webcam, microphone, speakers, and screen share free in your browser, with no download, sign-up, or upload.

Webcam Test

Check your camera and microphone before a video call.

Mic Test

Check your microphone before a video call.

Speaker Test

Check your speakers before a video call.

Screen Share Test

Check your screen share before a video call.

Device diagnostics

See what's working on your hardware. Free tests for your keyboard, mouse, screen, and refresh rate, each showing exactly what's wrong instead of a single pass/fail.

Keyboard Test

Check every key on your keyboard works.

Dead Pixel Test

Check your screen for dead or stuck pixels.

Mouse Test

Check your mouse's buttons, scroll wheel, and cursor tracking.

Monitor Refresh Rate Test

Check your monitor, laptop, or phone's real refresh rate.

QR & barcode tools

Create and read scannable codes free in your browser. Generate barcodes in every retail and shipping format, or scan a QR code with your camera or an image.

Barcode Generator

Create scannable barcodes free in your browser.

QR Code Scanner

Scan and decode QR codes with your camera or an image.

WiFi QR Code Generator

Turn your WiFi password into a scannable QR code.

vCard QR Code Generator

Turn your contact details into a scannable QR code.

Color tools

Pick, convert, and fine-tune colors free in your browser. Get exact HEX, RGB, HSL, and CMYK values, sample a color from an image or your screen, and explore harmonies, with nothing uploaded.

Color Picker

Pick a color and get its HEX, RGB, and HSL code.

CSS Gradient Generator

Build a CSS gradient and copy the code instantly.

Contrast Checker

Check if two colors pass WCAG contrast requirements.

Image Color Picker

Sample a color from a photo and get its HEX and RGB code.

Clean up and work with structured data free in your browser. Format and validate JSON, decode and encode Base64 text and files, encode and decode URLs and query strings, generate and validate UUIDs and GUIDs, instantly and with nothing uploaded to a server.

JSON Formatter & Validator

Format, validate, and convert JSON instantly.

Base64 Decode & Encode

Decode or encode Base64 text, files, and images instantly.

URL Encode & Decode

Encode or decode URLs and query strings instantly.

UUID / GUID Generator

Generate and validate UUIDs and GUIDs instantly.

Music tools

Tune your instrument, keep time while you practise, or find a track's tempo and key, free in your browser. Get your guitar in tune by ear or by microphone with standard, alternate, and custom tunings, practise to a metronome that holds any time signature and raises the tempo for you as a passage comes together, find your vocal range and voice type by singing, or drop in a track to get its exact BPM or musical key instantly. Nothing you play, sing, or upload ever leaves your device.

Guitar Tuner

Tune your guitar automatically with your microphone.

Vocal Range Test

Find your vocal range and voice type with your microphone.

BPM Finder

Find any track's exact BPM from an audio file or by tapping.

Song Key Finder

Find any track's musical key and Camelot code from an audio file.

Online Metronome

Practise to a click with subdivisions, odd meters and trainers.

Sound tools

Make and measure sound, free in your browser. Play any frequency from 1 Hz to 20,000 Hz with a tone generator that sweeps, stacks several tones at once, and saves a WAV. Run white, pink, brown or grey noise for as long as you like, with a sleep timer that fades out by itself. Find out which frequencies you can still hear, one ear at a time, and keep the chart. Or check how loud your room is with a live decibel meter that shows what your reading compares to in real life. Nothing is uploaded, whichever you use.

Decibel Meter

Measure how loud it is with your microphone.

Tone Generator

Play any frequency from 1 Hz to 20,000 Hz.

White Noise Generator

Play white, pink, brown or grey noise with a sleep timer.

Hearing Frequency Test

Find out which frequencies you can still hear, one ear at a time.

Image tools

Get an image into the format the thing you are sending it to will actually open. PNG to JPG and JPG back to PNG, the WebP a website handed you, and the HEIC photos an iPhone saved, converted to JPG, PNG or WebP in one pass, at whatever quality and size you need, with transparency handled and the GPS location dropped if you want it gone. Your files stay on your device throughout.

HEIC to JPG Converter

Turn iPhone HEIC photos into JPGs, hundreds at a time.

WebP to JPG Converter

Turn WebP images into JPG or PNG, a folder at a time.

PNG to JPG Converter

Convert PNG to JPG or JPG to PNG, as many as you like.

SVG to PNG Converter

Turn an SVG into a PNG at any size you name.