Keyboard Tester

Press every key to check that your keyboard registers it correctly.

Last key–
Key code–
Keys tested0
Keys held now0
Click here first, then press keys. Tested keys stay highlighted.

How to test your keyboard

Press each key in turn. A key turns bright while it is held and stays tinted once it has been detected, so untested or dead keys remain easy to spot. Keys that are not on the diagram, such as the number pad, still appear in the "Last key" and "Key code" boxes.

When to use it

Use the tester after a spill, when buying a used laptop, when checking a new mechanical keyboard, or when a key works only some of the time. While this page has focus, most keys are prevented from triggering browser shortcuts so that you can test them safely.

Frequently asked questions

A key does not light up. Is it broken?

Not always. Some keys are handled by the operating system or the browser before a web page can see them, such as the Windows key, Fn, Print Screen and media keys. Try the key in another program before concluding it is faulty.

How do I test for ghosting or key rollover?

Hold several keys at once and watch the "Keys held now" counter. If a key does not register while others are held, the keyboard has reached its rollover limit.

Does this work with a laptop or wireless keyboard?

Yes. It works with any keyboard your device recognises, including laptop, USB, Bluetooth and on-screen keyboards.

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