How to use Keyboard Test
- Press each key on your keyboard, one at a time.
- Pressed keys turn green on the on-screen keyboard. A key that is held down shows in yellow.
- Look for keys that never turn green. Tap Reset to start again.
Finding faulty keys
If a key doesn't light up, try pressing it in different spots. Debris under the keycap is a common cause and can often be cleared with compressed air. A key that lights up but repeats, or stays yellow after you let go, is sticking.
Some keys never reach websites. The Fn key is handled inside the keyboard, and the operating system keeps keys like Print Screen and some media keys for itself, so they won't light up even on a working keyboard.
Frequently asked questions
Why doesn't the Fn key light up?
Fn is handled inside the keyboard to change what other keys do, so it is never sent to the computer.
Can I test for ghosting?
Yes. Hold several keys at once and see whether they all light up. Gaming keyboards with N-key rollover should show every key.
Does this record what I type?
No. Keys are only shown on this page. Nothing is saved or sent anywhere.