Tech calculators

Dead Pixel Test

Check a monitor, laptop, or phone screen for dead, hot, and stuck pixels with a full-screen color test, plus a pixel-refresh flash mode for stuck sub-pixels.

Keyboard Test

Test every key on your keyboard with a live virtual layout, check how many keys register at once (rollover), and see which keys never registered.

Mouse Test

Test all five common mouse buttons (right-click included), measure your double-click interval against the default Windows setting, estimate the report rate, and count scroll ticks.