Keyboard Tester
See your physical keys respond in real time. Switch layouts, check individual keys, and keep track of tested positions.
Activate the test, then press keys on your keyboard.
Held keys are cleared when the window loses focus.
No keys held
Fn, power, and system shortcuts may not reach this page. A missing event does not prove a faulty key.
Use a physical keyboard. On a phone or tablet, connect an external keyboard to test hardware keys.
How to use this tool
- Choose the layout that matches your physical keyboard and activate the test.
- Press and release each key, or hold a combination. Filled keys are held; a check mark means tested.
- Restart to clear tested keys and the peak count. Held keys clear automatically on blur.
What this test can tell you
These results show only events delivered by your browser and operating system. They cannot certify N-key rollover or identify every hardware ghosting issue.
Fn, power, and system shortcuts may not reach this page. A missing event does not prove a faulty key.
Good questions. Clear answers.
Why does a key not light up?+
Some keys and shortcuts are intercepted by your system or browser. Fn and power usually do not produce web keyboard events. A key that does not appear is unconfirmed, not automatically faulty.