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 10 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.

Buttons, triggers, sticks and a stick drift check.

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

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.

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

Why this is private

Every test runs as JavaScript inside your browser. Recordings, photos and results stay in your device memory and are erased when you close the tab. There is no server to send them to.