Mouse Test
Verify left, right, and middle buttons, scroll wheel, and tracking accuracy.
Works with touchpads and mice
Mouse & Scroll Wheel Tester
Verify left, middle, right clicks, wheel scrolling, and observe double-click debounce timing to diagnose faulty microswitches.
Left Click (Button 0)
0
Click to test
Middle Click (Button 1) & Scroll Wheel
0 clicks
Scroll to test
Right Click (Button 2)
0
Right-click to test
Click and scroll inside this interactive test surface to observe mouse input events.
Supports Left, Middle, and Right Clicks + Scroll Wheel (Context menu intercepted for testing)
Double-Click Timing Observer
Interval between consecutive clicks in milliseconds.
Note: Event timing measures browser DOM event dispatch latency, not lab-grade hardware sensor polling rates.
Diagnosing Unintended Double-Clicks
A worn mouse switch frequently triggers involuntary double clicks with intervals under 80ms when you intend a single click. Observe the interval counter to detect switch chatter.
How to Test
- •Click inside the test area with each mouse button and watch each one register.
- •Scroll to verify the wheel direction and detents.
- •Move the cursor around to confirm smooth tracking without jumps.
Browser Limitations
- •Browsers suppress the context menu inside the test area; this is expected.
- •DPI and pointer acceleration are OS-level settings and are not measured here.
Troubleshooting Tips
- •A chattering button registering double clicks points to switch wear — see the guide.
- •Try a different USB port or replace wireless batteries first.
About the Mouse Test
The Mouse Test records every click, wheel movement, and pointer motion your browser receives and shows which mouse buttons actually fired. A few seconds of clicking answers the common questions: does the left button double-fire, does the wheel skip, does the cursor jump.
It works for touchpads too: taps, two-finger presses, and scroll gestures are reported as the browser sees them, which makes this a quick check before blaming an app for missed clicks.
Tips for a reliable result
- Click with each button in turn — left, right, middle — and confirm each one registers separately.
- Roll the wheel slowly in both directions, then quickly, to expose skipped detents or inverted scrolling.
- Move the cursor in slow circles across the whole area; a stuttering or jumping trail points to a dirty sensor or a bad surface.
- If you suspect a worn switch, click steadily fifty times and watch whether one click ever registers as two — that is the classic failure.
- Test on the surface you normally use; glossy or glass surfaces confuse optical sensors and are not a mouse fault.
Common problems and fixes
One click registers as two
That is switch chatter from a worn or dirty switch. See the mouse double-clicking guide on this site for the cleaning-versus-replace decision; if every double-click attempt shows two events, the switch is failing.
A button never registers
Try another USB port, or re-pair a wireless mouse with fresh batteries. If the middle button still never appears, note that some mice map it to horizontal scroll and some laptops have no middle button at all.
The cursor jumps or stutters
Clean the sensor aperture and try a matte surface. If jumping persists on another computer, the sensor is failing; if it disappears there, the original system had the problem — driver settings, power saving, or radio interference.
The context menu interrupts the test
The test area suppresses it while you click inside. If it still appears, click inside the marked area rather than near its edge, where the click may land on the page itself.
FAQ
Can this test damage my mouse?
No. It only listens to the events your system already produces — clicking here is no different from clicking anywhere else.
Does this measure DPI or polling rate?
No. Sensitivity and polling are handled by the mouse firmware and OS settings, and the browser receives already-processed pointer movements. This page verifies which buttons and wheel events arrive, not sensor precision.
Why is my double-click not counted as one double-click?
The tester reports every raw button-down event, which is exactly what you want when diagnosing a failing switch: a worn switch shows two rapid events for one physical press.
Does it work with touchpads?
Yes — taps, presses, and scroll gestures arrive as pointer and wheel events. Some touchpad gestures (pinch zoom, three-finger swipes) are consumed by the operating system and will not appear.