Mouse Tester
Click, scroll, and check every button — spot worn switches and scroll problems in seconds.
What this mouse test checks
- All five buttons — left, right, middle (wheel click), and the two side buttons. Pressed buttons light up blue, released ones turn green.
- Unwanted double-clicks — a single press that registers twice within ~80 ms means the switch is worn out.
- Scroll wheel accuracy — slow, steady scrolling should count one step per notch without skipping or reversing.
Common mouse problems explained
Most mouse failures come down to one component: the tiny mechanical switch under each button, rated for a few million clicks. As it wears, the electrical contact gets noisy and the mouse "chatters" — sending two clicks for one press. Cleaning rarely fixes chatter, but it often fixes a skipping scroll wheel, which is usually dust in the wheel encoder. If a side button dies completely, check whether your mouse software has simply unbound it before blaming the hardware. Testing your keyboard too? We have a tester for that as well.
Frequently Asked Questions
How do I test if my mouse buttons work?
Click each button — left, right, middle (wheel click), and side buttons — inside the test area. Working buttons light up on the diagram and appear in the event log. A button that never registers is not sending a signal to your computer.
How do I know if my mouse is double-clicking on its own?
Watch the double-click detector: click once at your normal speed. If the tool reports two clicks within about 80 milliseconds from a single press, your switch is worn and firing twice — the classic "double-click of death" on aging mice.
My scroll wheel skips or jumps. Can this test detect that?
Yes. Scroll slowly inside the test area and watch the scroll counter — each notch should register one step in one direction. If the count jumps by several steps or briefly reverses direction, the wheel encoder is dirty or worn.
Do side buttons (Mouse 4 / Mouse 5) work with this tester?
Yes — the back and forward side buttons register as buttons 3 and 4. Note that some browsers reserve them for page navigation; the test area suppresses that while your cursor is inside it.
Why does my mouse work here but not in my game?
If every button registers in this test, the hardware is fine — check the game’s key bindings, or software like driver utilities that may remap buttons in specific applications.