Mouse tester
Test left click, right click, middle click, and scroll wheel.
The mouse tester tracks left clicks, right clicks, middle clicks, and scroll wheel movement inside a test area, with a running count for each — useful for checking a mouse's buttons and scroll wheel are all working correctly.
Left click
0
Right click
0
Middle click
0
Scroll
0
How to use
- Click inside the test area with your left, right, and middle mouse buttons, and scroll the wheel.
- Each count increases as it detects the corresponding action.
- Click "Reset counts" to start over.
Common use scenarios
- Checking every button on a new mouse works before the return window closes.
- Diagnosing a mouse with a suspected double-clicking or unresponsive button.
- Testing a secondhand mouse before purchasing.
- Verifying a scroll wheel isn't skipping or double-triggering.
✓Content & verification reviewed: 2026-08-27
How we verify Mouse tester
How to run a thorough test.
Each button and the scroll wheel has its own independent count
This lets you isolate exactly which input is misbehaving — for example, if the left-click count increases by 2 for a single click, that's a strong sign of a double-clicking button issue.
The right-click context menu is intentionally suppressed inside the test area
This is necessary to actually detect and count the right-click itself — your browser's normal right-click menu returns as soon as your cursor leaves the test area.
A single click should only increase its counter by exactly 1
If you click once and the counter jumps by more than 1, that's a sign of a hardware double-click issue rather than a testing artifact.
Before you rely on the result
- You've clicked left, right, and middle individually and watched each counter.
- You've scrolled up and down to confirm the scroll counter increases smoothly.
- A single click only increased its counter by 1, not more.
- You've reset counts between different tests to keep results clear.
Who this is for
- Anyone checking every button works on a new mouse.
- People diagnosing a mouse with a suspected double-click or unresponsive button.
- Anyone testing a secondhand mouse before purchasing.
- People verifying a scroll wheel isn't skipping or double-triggering.
Real-world examples
New mouse check
Someone tests left, right, and middle click along with the scroll wheel on a newly purchased mouse before the return window closes.
Diagnosing a double-clicking button
A person suspecting their mouse is registering a single click as two uses the counter to confirm the exact behavior.
Secondhand purchase check
A buyer tests a secondhand mouse's buttons and scroll wheel before completing the purchase.
Limitations
- Right-click is captured for testing purposes, which suppresses the normal browser right-click menu while your cursor is inside the test area.
Frequently asked questions
Why doesn't right-click open a menu while testing?
The context menu is intentionally suppressed inside the test area so the click itself can be detected and counted — it returns to normal as soon as your cursor leaves that area.
What does it mean if one click increases the counter by 2?
That's a common sign of a hardware double-click issue, where a worn switch registers a single physical click as two separate clicks.
Does this test the mouse's DPI or sensor tracking?
No — only button clicks and scroll wheel movement. Tracking accuracy and DPI would need a different kind of test.
Can I test a trackpad with this?
Left and right click counts can work with a trackpad's click and two-finger-tap equivalents, but middle-click and scroll behavior vary by trackpad and OS gesture settings.
🔒 Runs in your browser — nothing is uploaded. Results are for reference only; see the disclaimer. Last updated: 2026-08-27
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