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Free Mouse & Trackpad Test — Clicks, Scroll & Drift

Check clicks, scroll, movement, and double-click misfires.

Move, click, and scroll to test every mouse interaction.

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Left clicks

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Middle clicks

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Right clicks

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Double-clicks

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Scroll steps

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How it works

How to use the mouse test

Move your mouse over the dark testing area — your cursor trail is visualised as a series of dots, and your current coordinates appear in the top-left corner. Click anywhere to register a click event, which increments the corresponding counter. The double-click counter tracks two clicks within 400 ms — if it climbs during normal use, your mouse switch may be malfunctioning. Scroll up and down to see raw scroll delta values.

What the mouse test reveals

Double-click misfiring

Every mouse switch has a rated lifespan (typically 5–50 million clicks). As switches age, the metal dome or spring mechanism can wear unevenly, causing a single press to bounce and register twice. Dust ingress accelerates this wear. If the double-click counter increases when you deliberately click only once, your switch needs attention. Some gaming mice let you adjust the debounce time in software to mask the issue, but the root cause is physical wear.

Scroll wheel issues

Mouse wheels use an optical or mechanical encoder to detect rotation. As the encoder accumulates dust or the mechanical detent wears down, the wheel may register inconsistent steps, skip in the wrong direction, or fail to register at all. The scroll delta on this test shows the raw step count — a healthy wheel produces consistent small deltas per notch. Erratic or zero deltas suggest a failing encoder.

Button consistency

If left-click occasionally registers as right-click or fails to register, the switch contact may be contaminated or the PCB may have a cold solder joint. Compare left and right click counts over a test session — a significant discrepancy indicates a problem.

Trackpad users

Laptop trackpads report the same mouse events, but behaviour varies by driver. Middle-click is often emulated via three-finger tap, and right-click via two-finger tap. Scroll zones on the trackpad edge send scroll events. The coordinate trail and click counters work the same as for an external mouse.

Related tools

Frequently Asked Questions

What is double-click misfiring? expand_more
Double-click misfiring happens when a single physical click registers as two clicks. It is often caused by dust or debris inside the switch, worn-out mechanical contacts, or a switch that is nearing the end of its lifespan. The double-click counter on this test can reveal the problem — if it counts multiple double-clicks during normal use, your mouse switch may need cleaning or replacement.
How can I tell if my mouse wheel is failing? expand_more
A failing scroll wheel may register random direction changes (scrolling up when you scroll down), erratic step counts, or no scroll events at all. This test shows the raw scroll delta and direction for each tick. If you see inconsistent deltas or opposite-direction entries while scrolling smoothly, your encoder wheel may need cleaning or replacement.
Why does my cursor skip across the screen? expand_more
Cursor skipping is usually caused by a dirty sensor (on optical mice), an unsuitable mouse pad surface, or interference on wireless mice. Check the mouse trail visualisation — if the dots are far apart in straight-line segments, the sensor may be losing tracking. On wired mice, a damaged cable can also cause intermittent skips.
What is a normal polling rate? expand_more
Most office mice run at 125 Hz (8 ms between reports), gaming mice at 500–1000 Hz (2–1 ms). A higher polling rate means the mouse reports its position more frequently, resulting in smoother cursor movement. The mouse DPI test tool measures this more precisely — this test focuses on click and scroll behaviour.
Can I test a laptop trackpad with this? expand_more
Yes. Trackpads report standard mouse events — movement, clicks (left/right), and scrolling. Note that some trackpad drivers simulate middle-click via a three-finger tap. The coordinate display works the same as for an external mouse, so you can verify every interaction your trackpad supports.