Keyboard Test
Press every key to find dead, sticky or double-typing ones: ANSI, ISO and JIS layouts, Windows or Mac, rollover and chatter checks, with a key log.
Press any key
Each key lights up blue while held and stays green once it works. Hold several at once to test rollover.
While this page has focus, keys are captured for the test. To move on with the keyboard, hold Esc for a second.
Results
- Most keys at once
- 0
- Hold down as many keys as you can - say A S D F J K L.
- Held now
- —
- Double presses (chatter)
- None so far. Tap keys normally - a worn switch shows up here.
Key log
Keys you press appear here.
Some keys never reach web pages, so they can't light up here: Fn, media and brightness keys, and keys the system keeps for itself (Print Screen on some systems, the Windows or ⌘ key in shortcuts). That doesn't mean they're broken.
This keyboard test shows every key on a drawing of your keyboard - ANSI, ISO or JIS, Windows or Mac, with or without a number pad - and lights it up the moment it's pressed. Keys that work turn green, so a dead key stands out at once. Hold several keys together to see how many your keyboard can register at the same time (rollover), and tap normally to catch chatter: a worn switch that types a letter twice. The legends follow your own layout where the browser shares it, and the key log shows each key's name, physical code and how long it was held.