Mouse Test: Buttons, Scroll Wheel and Movement

Press every button, roll the wheel and move across the pad. Each input lights up on the diagram so you can see exactly what your mouse reports.

A mouse can look perfectly fine and still be quietly failing. The right button that only works when pressed hard, a scroll wheel that jumps back a notch when you scroll down, a side button that stopped responding months ago and you never noticed. This mouse test puts every input on one screen so you can check them all in under a minute: left, right and middle buttons, both side buttons, vertical and horizontal scrolling, and pointer movement.

Each button lights up on the diagram while you hold it and keeps a teal outline once it has been tested, so you can see at a glance what is working and what is left to check. It is useful after buying a new or second hand mouse, before returning one under warranty, or whenever something feels off mid-game.

How to test your mouse buttons and scroll wheel

1. Move your pointer into the test area. Everything is captured inside it, including side buttons that would normally make the browser go back a page.
2. Press each button one at a time: left, right, middle (push the wheel down), back and forward.
3. Scroll up and down slowly, one notch at a time, then quickly. If your mouse tilts the wheel sideways, try horizontal scrolling too.
4. Move the mouse around to see the live pointer position and movement speed.
5. Check the counter for buttons tested. When every part of the diagram is outlined, the basic hardware is working.

How the mouse tester reads your hardware

Buttons

Your browser reports a standard button number for every press: 0 for left, 1 for middle, 2 for right, 3 for back and 4 for forward. The tester listens for the press and release of each one separately, which is why a button lights up for exactly as long as you hold it. The right-click menu and side button navigation are blocked only inside the test area, so the rest of the page behaves normally.

Scroll wheel

Every wheel movement arrives as an event with a direction and size. The tester counts up and down steps separately. That is what makes it good at catching a bad encoder: if you scroll down and the up counter also ticks, the wheel is sending signals in the wrong direction.

Movement

Pointer position is shown in pixels relative to the test area, and movement speed is calculated from how far the pointer travelled between updates. It is a quick sanity check that tracking is smooth, not a sensor benchmark.

Why test in the browser

Vendor software shows what the mouse thinks it is sending. A browser test shows what actually arrives on the other side, after drivers, remapping tools and the operating system have had their say. That makes it the fairer judge when you are deciding between a settings problem and a hardware fault.

What your results tell you

• A button never lights up. The switch may be dead, or the button is remapped in vendor software to a keyboard shortcut. Reset the mouse profile and test again.
• A button flickers while held. The contact is weak and drops out under pressure. This often precedes double clicking.
• Scrolling down registers some up steps. The wheel encoder is dirty or worn. Compressed air sometimes helps, otherwise the encoder needs replacing.
• Side buttons do nothing. Some mice only expose extra buttons through their own software, and a few budget mice send them as keyboard keys instead.
• The pointer stutters or jumps. Try another surface, clean the sensor window, and for wireless mice check the battery and move the receiver closer.

If a button works but occasionally fires twice, use the dedicated double click test. It times the gap between presses of each button and flags switch chatter precisely.

Going deeper than a basic mouse check

Sensor sensitivity

The number printed on the box is not always what the sensor delivers. The mouse DPI test measures your real counts per inch by dragging a known distance.

Report rate

Gaming mice advertise 500, 1000 or even 8000 Hz. The polling rate checker shows what actually reaches your browser.

Control and precision

Hardware that passes every test still has to be handled well. The mouse accuracy test scores how precisely you hit shrinking targets.

Tips for reliable mouse testing

• Test on the surface you actually use. Sensors behave differently on cloth, hard pads and bare desks.
• Close vendor software macros before testing so buttons report their default behaviour.
• For wireless mice, test at your normal distance from the receiver, not with it right beside the mouse.
• Repeat the test after a gaming session. Heat and wear can expose faults that are invisible when cold.
• Keep a note of results for a new mouse. If something fails later, you have a baseline for a warranty claim.

Your keyboard deserves the same check. The keyboard tester lights up every key you press on a full layout, and if you are curious how fast those healthy buttons can go, the CPS test is a quick next stop.

Frequently asked questions

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