Device testsG / P / L
Keyboard Tester
See which keys your browser receives.
Runs in your browser · No sign-upTest your device → Check responses
How to use it
- Click the keyboard or press a letter to begin.
- Watch the keys light up. Try modifiers, arrows and the number pad.
- Press Esc to pause. Click the keyboard to resume, or reset for a fresh test.
Before you start
The layout shows common US keyboard positions. Operating-system shortcuts, Fn keys and some browser shortcuts may not reach this page. This is an input check, not a hardware diagnosis.
Common questions
Why do Fn or some shortcut keys not light up?
Your keyboard, operating system or browser may handle them before a web page receives an event. An unlit key alone does not prove that the keyboard is broken.
Will this work with another keyboard layout?
The diagram represents common US physical key positions. The last-event message shows the key code the browser received, including keys not drawn on the diagram. A phone’s on-screen keyboard may not provide equivalent physical key events.
Something not working? Tell us about the issue. Please keep private files and passwords out of your message.