Cluster · Keyboard, mouse & switch

Input device tests.

Four instruments for the things you press and click. Each one reports a measurement rather than a verdict — how fast, how many, and whether a switch is firing twice when you pressed it once. All of it runs in this tab and none of it is uploaded.

• Instrument

  Keyboard Tester

  Every key, live: what registers, what repeats, and which switch is chattering.

• Instrument

  Mouse Test

  Buttons, wheel and movement — including the double-click fault that makes a mouse feel broken.

• Instrument

  Click Test

  Clicks per second over a fixed window, with the count and the rate both stated.

• Instrument

  Spacebar Counter

  The same measurement for the one key that takes the most abuse.