118+ tests · 100% in your browser

Test your devices, right in your browser

Microphone, camera, keyboard, mouse, display, controllers and more. No installs. No account. Nothing you record leaves your device.

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Microphone Test Webcam Test Keyboard Test Mouse Test Gamepad Test Dead Pixel Test Speaker Test Refresh Rate Test Touchscreen Test Printer Test Page MIDI Keyboard Test Device Information

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Audio TestsMicrophone, speakers, headphones, tone generators and hearing checks.Camera TestsWebcam preview, resolution, frame rate, capture and camera controls.Display TestsDead pixels, color, gradients, refresh rate and resolution checks.Keyboard & Mouse TestsKeyboard, mouse, touch and stylus input diagnostics.Gamepad TestsController buttons, sticks, drift, triggers and vibration.MIDI TestsMIDI keyboards, monitors, velocity, pitch bend and pedals.Mobile & Sensor TestsTouch, orientation, motion, vibration and mobile capabilities.System & Browser TestsDevice info, GPU, benchmarks, storage and browser capabilities.Printer TestsPrint-optimized alignment, color, black ink and DPI test pages.Network TestsConnection info, latency and stability — measured against this site only.Instrument Tuners & Music ToolsIn-browser tuners for guitar, bass, ukulele, strings and more, plus a chromatic tuner, pitch detector and metronome.

How it works

Every test runs locally using standard browser APIs. Camera and microphone access is only ever requested after you click, and streams are released the moment you stop or leave the page.

Private by design

No uploads of your camera, microphone, keyboard, or sensor data. No account. No hidden fingerprint. Just honest, local diagnostics.

Works everywhere

Optimized for phones, tablets and desktops. Installable as a PWA and usable offline for many tests.

Recently added

VRR Flicker Test

Vary the rendering cadence on a gray field to watch for the brightness flicker some FreeSync/G-Sync displays show. Browsers can’t confirm VRR.

Frame Skipping Test

Marching bars that step one pixel per frame reveal skipped frames as stutter or doubling — best judged with a phone camera photo.

Color Blindness Test

Ishihara-style plates that hint at red-green color vision differences. A for-fun, non-medical screening that depends on your screen.

OLED Burn-in Fixer

Cycle colors and moving patterns full-screen to help even out OLED image retention. May reduce mild retention; can’t fix permanent burn-in.

Stuck Pixel Fixer

Flash rapidly cycling colors over a stuck pixel to try to revive it. Includes a seizure warning, safe speed limits and auto-stop.

JavaScript Test

Confirm JavaScript is enabled and check support for common modern language features, with troubleshooting if scripts are blocked.

Camera & Microphone Device Enumerator

List your cameras, microphones and speakers with enumerateDevices, revealing names only after permission. Updates on plug/unplug.

Controller Input Viewer

A live JSON view of all buttons and axes, with a local event-trace recording you can download for debugging.