Something not working? Find out in ten seconds whether it's your gear or you.
Ten checks, each answering an actual question rather than just drawing a widget and leaving you to interpret it:
KEYBOARD — every key lights up as you press it, and any key still lit after you let go is called out as stuck. It also counts how many keys your keyboard can register at once.
MOUSE & CLICKS — all five buttons, the wheel, a movement trail, and clicks per second.
SCREEN — full-screen flats in black, white, red, green, blue and grey so a dead or stuck pixel has nowhere to hide, a smooth ramp that reveals colour banding, and your real refresh rate, measured.
MICROPHONE — a live level bar and waveform, and it tells you if you're clipping or if the wrong input is selected. Nothing is recorded.
SPEAKERS & HEADPHONES — left only, right only, both, a 20 Hz to 200 Hz bass sweep, and an 8 kHz tone.
WEBCAM — live picture with the real resolution and frame rate.
TOUCHSCREEN — every finger tracked in its own colour, so dead patches show up.
CONTROLLER — every button, both sticks, and stick drift called out by name.
Plus reaction time and a click speed test.
WHY THIS ONE Search for "keyboard tester" or "mic test" and you get wall-to-wall adverts, and several of those sites demand your microphone before they'll show you anything at all. This asks only when a test genuinely needs it, the permission dies with the tab, and nothing is ever recorded, uploaded or kept — there's no server here to send it to.
Free, no sign-up, no ads, no limits.
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