Everything runs locally — your data never leaves your device
Test your devices right in the browser
Microphone, camera, keyboard, screen and sensors — fast, private tests with no install.
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22 tools · 6 categories · 100% private
Audio
2 Microphone test Check that your microphone works in seconds. Press the button, allow access, and watch the live level meter react to your voice. Audio is processed only in your browser — nothing is recorded or sent anywhere. Stereo / left-right speaker test Confirm your speakers or earbuds work and aren't wired backwards. Play a tone through the left channel, the right channel, or both, using the Web Audio API — entirely in your browser, with nothing sent to a server.
Input
6 Webcam test Check that your webcam works in seconds. Allow access and your live camera feed appears, with a snapshot button plus resolution and frame-rate readout. The video stays in your browser — nothing is recorded or uploaded. Keyboard test Find dead, stuck or ghosting keys in seconds. Press any key and watch it light up on the on-screen layout while the key, code and keyCode appear. Everything runs in your browser — no permission, nothing recorded or uploaded. Mouse test Test every part of your mouse in seconds. Click, scroll and move the pointer to light up each button, see scroll direction, catch unwanted double-clicks and read live cursor coordinates. Everything runs in your browser — nothing is uploaded. Mouse Polling Rate Test Measure how many position updates per second your mouse sends by moving it across the screen. This free tool reads pointer events in real time to estimate your polling rate in Hz. Everything runs locally in your browser - nothing is uploaded. Double-click test Is your mouse registering two clicks when you press once? This double-click test catches that "chatter" — the classic sign of a worn left-button micro-switch. Click the pad with normal single clicks: any interval too short to be intentional is flagged in red and counted, with a live verdict. Everything runs in your browser — nothing is uploaded. Gamepad / controller test Check that your controller works — every button, trigger and thumbstick — using the browser's Gamepad API. See inputs light up in real time and test vibration, all locally with nothing sent to a server.
Display
4 Dead pixel test Fill your screen with solid red, green, blue, white and black to hunt for dead or stuck pixels on any monitor, laptop or phone. No download or permission needed, and nothing ever leaves your browser. Backlight Bleed & IPS Glow Test This free tool fills your monitor or laptop screen with solid black and dark shades in full-screen, making backlight bleed, clouding, and IPS glow easy to spot around the edges. It runs entirely in your browser; nothing is uploaded. Monitor refresh rate test Find out how many frames per second your display refreshes — 60 Hz, 120 Hz, 144 Hz or more. We measure it with requestAnimationFrame and show a moving animation so you can judge smoothness, all in your browser. Monitor color test Check your screen's color and uniformity in seconds. Cycle through solid red, green and blue swatches, smooth gradients that reveal banding, and grayscale steps for contrast — all rendered locally in your browser with nothing uploaded.
System
3 System info See your device's specs the moment the page loads: screen resolution, pixel ratio, GPU, CPU cores, memory, platform, languages, timezone and online status. Everything is read by your browser and stays on your device — nothing is uploaded. What is my screen resolution? Instantly read your screen's native resolution, browser viewport size, aspect ratio and orientation. The values update live as you resize the window, and everything is read in your browser — nothing is uploaded or stored. Browser detector Instantly see which browser and version you're running, plus its engine, operating system, languages and a live feature-support grid. Everything is read in your browser and shown only to you — nothing is uploaded.
Sensors
3 Multi-touch screen test See how many fingers your touchscreen can track at once. Each touch is drawn live with its own marker, and the test shows the current and maximum number of simultaneous touches — all in your browser, nothing uploaded. Gyroscope & Motion Sensor Test Test your phone or tablet's gyroscope and accelerometer right in the browser. See live orientation (alpha, beta, gamma), acceleration and a tilt visual that moves as you rotate your device. Everything runs locally, nothing is uploaded. Phone Vibration Motor Test Test your phone's vibration motor right in the browser. Trigger short, long, double and SOS haptic patterns to confirm the motor works. Everything runs locally on your device and nothing is uploaded.
Speed
4 CPS test Measure how fast you can click. Pick a duration, click the box as quickly as possible, and get your clicks-per-second (CPS) score to compare and share. Everything runs in your browser — no permission needed and nothing is uploaded. Typing speed test Find out how fast you type: start typing the passage and the tool measures your words per minute (WPM) and accuracy in real time. Pick a 1-minute or full-text run. Everything runs locally in your browser. Reaction time test Measure how fast your reflexes are: wait for the screen to turn green, then click as quickly as you can. Your time is measured in milliseconds, with best and average across attempts. Everything runs locally in your browser. Aim Trainer This free aim trainer pops targets at random spots so you can practice clicking fast and accurately. It tracks hits, accuracy and average reaction per target. Everything runs locally in your browser, and nothing is uploaded to any server.
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Everything runs locally
No installation
Free, no downloads