Keyboard Test

Press every key and watch it light up. Find dead, stuck or swapped keys in a minute.

  1. Press any key on your keyboard.
  2. Held keys turn blue; tested keys stay green.
  3. A key that never lights up isn't being detected.
Last key
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Code
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Location
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keyCode (legacy)
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Held right now
0

Private by design

Key presses are only shown on this page. Nothing you type is stored or sent anywhere.

How the keyboard test works

Every key you press is detected by your browser and highlighted on the on-screen layout. Keys stay green once tested, so you can work across the keyboard and spot any that never respond. The panel shows each key's name and code, which is handy when a key types the wrong character.

The layout is a standard tenkeyless (TKL) keyboard. Number-pad and media keys aren't drawn, but they still appear in the “Last key” panel when pressed.

Test for ghosting and rollover

Hold several keys at once (for example W, A, S, D and Space) and watch “Held right now”. If the count stops rising or a key doesn't light up, your keyboard has hit its rollover limit. Many office keyboards only register 2 or 3 keys in some combinations; gaming keyboards usually handle 6 or more.

A key isn't working. What now?

  1. Clean it. Turn the keyboard upside down and tap it, or use compressed air under the key.
  2. Check Fn and lock keys. Fn Lock, Num Lock or a “game mode” switch can disable or change some keys.
  3. Try another USB port or a fresh battery for wireless keyboards.
  4. Check the layout. If keys type the wrong symbols, the system keyboard language may not match your physical keyboard.

Frequently asked questions

Why don't the Windows key or Print Screen light up?

Your operating system can grab some keys before the browser sees them. Print Screen often only reports when released, and the Windows key opens the Start menu.

Will pressing F5 reload the page?

No. The test blocks most browser shortcuts so you can press every key safely. Shortcuts with Ctrl or ⌘ still work.