Runs in your browser only

Check your device in 10 seconds

Pick a test and it starts right away — no sign-up, no downloads. Everything runs inside your browser, so your audio and video stay on your device.

Tests ready 13 no sign-up, no downloads

All tests Check a used device

All tests

Microphone test

See your voice level live, record a few seconds and play it back.

Live preview, real resolution and frame rate, and a snapshot you keep.

Headphone and speaker test

Left, right and both channels, plus a smooth frequency sweep.

An on-screen keyboard that lights up every key you press.

All buttons, double-click timing, scroll wheel and polling rate.

Clicks per second over 1, 5, 10, 30 or 60 seconds.

Hit targets for 30 seconds: accuracy, misses and time to hit.

Buttons, triggers, sticks and a stick drift check.

Full-screen colours for dead pixels, plus a touch test on phones.

Refresh rate test

Approximate hertz of your screen and how steady the frames are.

Reaction time test

Five tries, then challenge a friend with a link.

Hit the green lights, dodge the red crosses, beat a friend.

Browser, system, screen, graphics card, memory and network.

Common problems

Buying a used laptop or phone?

Walk through a guided 2–3 minute check of the screen, touch, cameras, microphone, speakers and buttons, then get a shareable report with a QR code.

Check a used device

Video call coming up?

Check the camera, microphone and speakers one after another in under a minute, and see exactly what to fix before you join.

Check before a call

Why this is private

Every test runs as JavaScript inside your browser. Recordings and photos stay in your device memory and are erased when you close the tab. The site has no database and no server-side code, so your sound, video and results have nowhere to go.