Keyboard Tester
Check every key works
Press any key on your keyboard. Keys light up while held and stay green once they've worked.
Key event details
| key | code | keyCode | location |
|---|
Some shortcuts belong to your computer and never reach the page (for example Cmd+Q, Alt+Tab or the Windows key menu), and the Fn key isn't reported by any browser. On a laptop, the tester shows the keys your keyboard has: missing keys such as a number pad simply stay grey.
About the Keyboard Tester
Find out whether every key on your keyboard works. Press each key and it lights up on the map while held and turns green once it has worked, so dead or sticky keys stand out. Hold several keys together to check rollover (how many keys your keyboard registers at once, which matters for gaming), and open the event details to see each key's key, code and keyCode values.
- Press keys on your keyboard one by one.
- Watch them light up: green means the key works.
- Hold several keys at once to test rollover.
- Press Reset to start again.
Frequently asked
Why doesn't a key light up?
It may be broken, or the computer may handle it before the browser sees it: Fn, some media keys and system shortcuts like Alt+Tab or the Windows key menu never reach web pages.
What is key rollover or ghosting?
Rollover is how many keys a keyboard can register at once. Cheaper keyboards often stop at 2–6 keys, and some key combinations get missed (ghosting). Gaming keyboards usually handle many more (n-key rollover).
Does it work on a laptop?
Yes. Keys your laptop doesn't have, like the number pad, simply stay grey. Smaller screens show the main keys only.
Is what I type sent to a server?
No. The tool runs entirely in your browser and there's no server behind it, so what you type never leaves your device and nothing is stored. You can check: it keeps working if you go offline after the page has loaded.
More from the Web & QR drawer
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