toolsko

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Keyboard Tester

Press every key and see it light up. Check broken keys, stuck keys and N-key rollover.

Tool inputs stay in your browser · optional AI search sends your query

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Good to know: Reads physical keyboard events in this browser. A key that never lights up may be broken or captured by the operating system or another app before it reaches the page. The max-at-once number is a practical rollover check, not a lab measurement.

How to use it (step by step)

  1. 1Click the page, then press each key one by one. The matching key turns blue while held and green after testing.
  2. 2Hold several keys together to see your max-at-once rollover result.
  3. 3Use Reset test to clear the colors and start again.

Words to know

No special words here. Just follow the steps. If anything is unclear, email [email protected] and we will explain it better.

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