Keyboard Test

How to test your keyboard

1. Click anywhere on the page so it has focus, then press each key one by one.
2. A key turns blue while you hold it, then stays green once it has worked. The counter shows how many keys are done.
3. A key that stays grey after you press it is not sending anything: it may be dead, dirty, or remapped.
4. To check rollover (how many keys work at once), hold several keys together: “Most keys held at once” shows the best number reached.
5. On a laptop or a 75% keyboard without a number pad, tick Hide numpad.

Once every key works, see how fast you type with the typing test.

Ghosting and rollover, explained

Rollover is the number of keys your keyboard can register at the same time. Cheap keyboards often stop at 2 or 3 keys in some combinations: an extra key you press is simply ignored. This is called ghosting or key blocking, and it matters in games where you hold W, Shift and Space while pressing another key.

Gaming and mechanical keyboards often advertise 6-key rollover (6KRO) or N-key rollover (NKRO), meaning any number of keys. Hold the combinations you use in your games and check that they all light up together.

A key does not work? Quick fixes

1. Clean it. Turn the keyboard upside down and shake it, or use compressed air under the key.
2. Try another USB port or another cable; for a wireless keyboard, change the batteries or re-pair it.
3. Check the layout. If keys print the wrong letters, your system may use another layout (AZERTY, QWERTZ…). Check the language settings.
4. Check special modes. Num Lock changes the number pad; some gaming keyboards have a “Game mode” that disables the Windows key.
5. Test on another computer. If the key fails there too, the problem is the keyboard, not your system.