Keyboard Test
Press any key. It lights up below as you type — no clicks needed, just start typing.
Recent keys
Waiting for input…
What this test checks
Every key you press is detected through your browser's physical key events, so it works with any keyboard in any language layout. A key that never lights up is not registering — usually a stuck switch, a broken solder joint, or debris under the keycap.
The rollover counter shows how many keys your keyboard can register at the same time (N-key rollover). Hold down several letter keys at once: gaming keyboards typically handle 6 or more, while basic office keyboards may miss keys beyond 2–3 — that's called ghosting.