How to test your keyboard
- Click on this page, then press each key once. It turns red while pressed and stays tinted afterwards.
- Keys that never light up may be dead — try them in a text editor to confirm.
- To test rollover (anti-ghosting), hold several keys at once — e.g. W+A+Shift+Space for games — and watch the “max at once” number.
Some keys (like Fn, Print Screen or media keys) are handled by your operating system and never reach the browser — that’s normal.
Why this one?
- No sign-up, no limits. Use it as much as you like.
- Runs in your browser. Keystrokes are never stored or sent.
- No pop-ups or fake download buttons. Ads stay out of the way of the tool.
Related tools
FAQ
Why doesn’t the Fn key light up?
Fn is handled inside the keyboard itself and is never sent to the computer.
What’s a good rollover number?
Most office keyboards register 3–6 keys at once; gaming keyboards often support all keys (“N-key rollover”).