About the Keyboard Tester
Press every key once: each one lights up while held and stays green after it's worked, so a key that never turns green isn't registering. Keys that fire twice from a single press (chatter, a common fault on worn mechanical switches) are flagged.
The key code, key value and location are shown for each press, which is handy for programmers and for remapping keys.
How to use the Keyboard Tester
- Click on the page, then press keys one by one.
- Check that every key turns green.
- Watch for chatter warnings.
Features
- Full layoutIncluding arrows and F-keys.
- Chatter detectionDouble presses flagged.
- Key codescode, key and keyCode.
- Nothing recordedRuns only in your browser.
Frequently asked questions
Why don't Fn or media keys show?
They're handled by the keyboard or operating system and never reach the browser.
Is the Keyboard Tester free?
Yes. The Keyboard Tester is completely free with no sign-up, no watermarks, no daily limits and no premium tier.
Are my files uploaded to a server?
No. FileStripe processes your files locally in your web browser using JavaScript. Nothing is uploaded, so the Keyboard Tester is safe for private photos and confidential documents and even works offline once the page has loaded.
Does it work on iPhone and Android?
Yes. The Keyboard Tester works in Safari, Chrome, Firefox, Edge and Samsung Internet on phones, tablets and computers. On a phone you can pick files from your photo library or files app and share the result straight to another app.
Last updated · Processing happens locally in your browser.