Mouse Test
Click every button on your mouse. Each one lights up below the instant the browser receives it — if a button never lights up, the signal isn't reaching the browser at all.
Click anywhere in this area with left, right, and middle buttons, scroll the wheel, drag, and — if your mouse has them — press the thumb side buttons.
What this actually tests
The browser sees mouse buttons as numbered inputs, not physical parts — button 0 is left, 2 is right, 1 is the wheel, and 3/4 are the thumb buttons. This page reports what actually arrives at that level, so a button that never registers here has failed somewhere between the switch and the driver, not in your software.
If a button doesn't respond
- Try a different USB port, and a different cable if it has one.
- Test on another computer — that separates the mouse from the driver.
- Check the vendor software. Side buttons are often remapped to nothing by default.
- Reinstall the driver, then re-run this test before buying a replacement.
Clicking twice when you click once?
Double-click testFAQ
My mouse works in some apps but buttons don't light up here — why?
Some launcher or macro software intercepts buttons before the browser sees them, remapping a click into a keyboard shortcut or an app action instead of a real click event. Close vendor software like Logitech Options or Razer Synapse and try again — if the button lights up with that software closed, the remap is the cause, not a hardware fault.
Do side buttons work on every mouse?
No — only mice that physically have thumb buttons will register anything on Back/Forward, and even then some budget mice wire them as keyboard shortcuts rather than real mouse buttons, so they won't show up here at all. That's normal for that hardware, not a defect.
Can this test detect a failing sensor?
Indirectly. If movement never registers regardless of surface, cable, or USB port, that points to the sensor or its connection rather than a setting. But a sensor that mostly works with occasional jumps or dropouts needs the surface and connection checks in the guide above before you write it off as hardware failure.
Related tools
Double-Click Test
Catch a worn switch firing twice on one click.
Scroll Test
Check wheel direction and consistency.
CPS Test
Time your clicks-per-second.
Mouse not working
Wrong surface, connection, settings, or debris.
Mouse double-clicking on one click
Why switches wear out, and what actually fixes it.
Light on but cursor won't move
Sensor, surface, and connection checks.