Keyboard tester
Press every key on your keyboard. Working keys turn green; dead keys stay grey, and stuck or double-typing keys are flagged in red.
Press any key to start. Press every key once to test the whole keyboard.
No problems so far. Keys that never light up when pressed may be dead or blocked by your system.
Some keys (Fn, Print Screen, media keys and some system shortcuts) are handled by your computer and may not reach the browser.
How to test your keyboard
Click on this page so it has focus, then press each key one at a time. The tester reads the browser's key events, so it works with laptop, USB, wireless and mechanical keyboards on any system.
- 01A key that never lights up is not sending a signal. Try it in another app to rule out software; if it still fails, the switch, keycap or cable may need attention.
- 02
Stuck keys
A key that stays lit after you let go is stuck down or sending repeated presses. Debris under the keycap is the most common cause. - 03
Double typing (chatter)
If one press registers twice, the switch is chattering. It is common on worn mechanical switches and some laptop keyboards. Cleaning sometimes fixes it; otherwise the switch needs replacing. - 04
Ghosting and rollover
Hold several keys together. If some stop lighting up, your keyboard has limited rollover, which matters for gaming and very fast typing.
Questions people ask
4 answersWhy don't some keys show up?
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Keys like Fn, media keys and some system shortcuts are handled by your computer before the browser sees them. That does not mean they are broken.
Does this work with mechanical keyboards?
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Yes. It works with any keyboard your computer recognises, including mechanical, wireless and laptop keyboards.
Is anything I type sent anywhere?
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No. Key presses stay in your browser and nothing you type is recorded or uploaded.
My keyboard works. What now?
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Find out how fast you type with a 1 minute typing test.