Ready · Browser input diagnostic

Online Keyboard Test – Keyboard Tester

Check whether every key on your keyboard works correctly. Press keys on your physical keyboard and watch them light up instantly on the screen.

Last key——

Keys tested0/ 00%

Currently pressed—Max simultaneous: 0

LocksCaps —Num —Key code: —

Press any key on your keyboard to test it.

Guide

How to use this test

1
Click anywhere on the tester and begin pressing keys on your physical keyboard.
2
Each detected key lights up and stays marked after it has been tested.
3
Use the live panel to see the key name, code, lock states and simultaneous key presses.
4
Choose Reset Test whenever you want to start a fresh check.

A keyboard test is a quick way to find keys that do not respond, repeat unexpectedly or behave differently from the rest of the keyboard. The tester runs directly in your browser, so there is nothing to install and your keystrokes are not sent to a server.

The on-screen layout is useful after cleaning a keyboard, replacing keycaps, buying a used keyboard or troubleshooting a laptop. It can also identify the physical KeyboardEvent code for the key you are pressing and show combinations that are held at the same time.

✓

Local browser processing

Keyboard events are processed in this page. No account or upload is required to run the test.

FAQ

Frequently asked questions

Is this keyboard tester free?+

Yes. The keyboard test is free to use and works directly in a modern web browser.

Does the test record what I type?+

No. Detection happens locally in your browser. The tool does not need to send your keystrokes to a server.

Can I test multiple keys at once?+

Yes. Hold several keys together and the tester will show the currently pressed combination and the maximum number detected simultaneously.

Why does a function key open a browser action?+

Some browser or operating-system shortcuts can be intercepted before a webpage receives them. This is normal and does not always indicate a faulty key.