Free Online Mouse Tester

1. Move the cursor into the dashed test area.
2. Click each button, including middle and side buttons if your mouse has them.
3. Scroll inside the area to log up and down wheel events.
4. Watch the position, CPS and per-button counters update live.

Mouse testers confirm that all the buttons on a new (or ageing) mouse fire the events you expect, that double-clicks register cleanly and that the scroll wheel triggers events in both directions. This tool listens for mousedown, wheel and pointermove events inside a test area and tallies the results. A 1-second sliding window drives a live clicks-per-second readout.

IT teams diagnose intermittent click issues before processing a hardware swap. Gamers benchmark a new mouse before competitive sessions. Software developers verify how middle-button or thumb-button events arrive in their handlers. The test area blocks the default right-click context menu so you can verify right-button presses without the menu interrupting.

Browsers vary in their support for back/forward thumb buttons — if those don't register, that's usually a browser limitation rather than a hardware fault.