Keyboard Test

This keyboard test shows a full-size keyboard – function row, number row, letters, modifiers, navigation keys, arrow keys and number pad – and lights up every key the browser receives. Keys light up while they are held down and stay green once they have worked, so a quick pass over the keyboard shows any key that never registers. Under the keyboard you can see the last key's details (event.key, event.code, keyCode and whether it was the left, right or number-pad version) and a history of what you pressed. Nothing is sent anywhere; the test runs entirely in your browser.

Ghosting means that some key combinations are not detected when several keys are held at once. Hold down the keys you use together – for example W, A, Shift and Space in games – and watch whether all of them stay lit. If one stays white while the others are held, your keyboard cannot report that combination. A stuck key stays lit after you let go; press it a few times and check under the keycap for dirt.

Some keys are handled by the operating system or the keyboard itself before a web page can see them. The Fn key, media keys, brightness keys and some laptop function-row shortcuts usually never appear, and combinations such as Ctrl+W or Cmd+Q will act on the browser. Print Screen often reports only when it is released. If such a key does nothing here, test it in its normal use instead.

The tester uses the physical key position (event.code), so it works with QWERTY, AZERTY, QWERTZ and other layouts – the letters on the drawing follow US QWERTY, but the key that lights up is the one in that position on your keyboard. The event.key value under the keyboard shows the character your layout actually produced.