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Keyboard key and input test

Use the live matrix to confirm that physical key presses reach the browser, build a tested-key map and check simple simultaneous-key behavior. The test is especially useful for finding a dead key, intermittent switch or wrong keyboard-layout assumption.

How to test a keyboard

  1. Press keys one by one and confirm each matching key lights up.
  2. Pay extra attention to keys that feel inconsistent in normal use.
  3. Hold two or more keys together to confirm simultaneous input is visible.
  4. Reset the test and repeat a suspicious key several times.
  5. For larger gaming combinations, use the dedicated Ghosting & Rollover Test.

If a key does not appear

  • Try the key in another application to confirm the operating system receives it.
  • Reload the page and test again.
  • Try a different browser if the key is part of a browser shortcut.
  • Reconnect an external keyboard or try another USB port.
  • Check keyboard-layout and remapping software if the wrong code appears.

Browser limitations

Some shortcuts are intercepted by the operating system or browser before a webpage can read them. Media keys, special function layers and vendor-specific controls are not guaranteed to expose standard key events.

A missing browser event is useful evidence, but it is not enough by itself to prove a failed switch.

Keyboard test FAQ

Does this test change my keyboard settings?

No. It only listens for browser key events and keeps the session state on the page.

Can I test NKRO?

The main matrix shows simultaneous keys, but the dedicated ghosting/rollover test is better for repeatable multi-key combinations and maximum simultaneous counts.

Why does a shortcut leave the page?

Some system/browser shortcuts take priority over webpage input. Test an alternative combination before blaming the keyboard.

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