Keyboard Tester

About Keyboard Tester

A keyboard tester checks that every key on your laptop or external keyboard registers correctly. Press keys and each one lights up on the on-screen layout, turning green once tested — so you can quickly find dead keys, stuck keys, or unresponsive keys. Switch between QWERTY and AZERTY layouts and PC or Mac key labels, and see the key, code, and keyCode of your last press. Everything runs in your browser with no download, and nothing is recorded.

Frequently asked questions

How do I test my keyboard?

Just press each key. Keys light up as you press them and turn green once tested, so any key that doesn't respond is easy to spot on a laptop or external keyboard.

Does it support AZERTY and Mac keyboards?

Yes. Switch the layout between QWERTY and AZERTY and the platform between PC and Mac — the on-screen keys relabel to match (for example Command and Option on Mac). It detects Mac automatically.

What are stuck and dead keys?

A dead key doesn't register at all, so it never lights up on the layout; a stuck key registers continuously, staying lit. The live highlight makes both easy to see. Pressing several keys at once can also reveal ghosting, where some presses drop.

What do key, code, and keyCode mean?

'key' is the character produced, 'code' is the physical key's identifier (like KeyA), and 'keyCode' is the legacy numeric code — useful for developers.

Is anything I type recorded?

No. The tester runs entirely in your browser and stores nothing — keystrokes are only used to light up the on-screen keyboard.