Mouse Test
Press every button and roll the wheel over the panel. Each one lights up while held and keeps its own counter, so a dead or chattering button is obvious.
Hover here, then click every button and scroll.
What to look for
- A counter that jumps by two on one press: the switch is chattering. See the double click test.
- A button that stays lit after you let go: the switch is sticking.
- Wheel counts in the wrong direction or skipping: the encoder is dirty or worn. The scroll test gives more detail.
- No reaction from a side button: check it is not remapped in your mouse software.
Before you replace the mouse
Try another USB port and a different cable or receiver position, update the mouse firmware, and check whether its software has a debounce or "click response" setting. Many chattering switches are fixed by raising the debounce time a few milliseconds. If the mouse is under warranty, a recorded counter jump is good evidence for a claim.
Questions
How do I test my mouse buttons?
Hover over the test area and press each button. Its label lights up while held and a counter increases with every press, so you can see whether any button fails to register or registers twice.
Can I test the side buttons?
Yes. Back and forward side buttons (buttons 4 and 5) are detected, and the page stops them from navigating while your cursor is over the test area.
Why does one click count twice?
That is switch chatter, usually a worn switch. Run the double click test for a detailed check.
Does it test extra buttons beyond five?
Browsers only expose five mouse buttons. Extra buttons that are mapped to keys in your mouse software can be checked on the keyboard tester.