KEYBOARD INPUT · ROLLOVER CHECK

Keyboard Test

Press a key to light up its matching key on screen. Hold several keys together to check whether they are all detected.

Keyboard input test

Ready for keyboard inputLast key: None
Keys currently held0
Total key presses0
Max simultaneous keys0

Press keys to test them. Hold several at once to see the maximum simultaneous inputs detected.

On phones and tablets, this checks input from an external keyboard. Some special keys may be blocked by the browser or operating system.

Simultaneous key leaderboard

Shared leaderboard. Scores are posted only after you enter a nickname.

  1. Press multiple keys, then save your result.

How to use

  • Press and release a key to light up its matching key on screen.
  • Hold multiple keys together to see the maximum simultaneous inputs received by the browser.
  • Reset clears the total press count and the maximum simultaneous count.

What this test measures

This tool checks keyboard events delivered to the browser. It does not measure the keyboard’s actual polling rate or exact input latency. Keys blocked by the operating system or browser may not appear.