Mouse Test

How to use

1. Click each button. Press left, right, middle, and side buttons. The matching area lights up green when registered.
2. Scroll the wheel. Keep the pointer on the mouse and roll the wheel slowly up, then down. Each direction has its own counter, and rolling one way should not add to the other.
3. Watch for double-clicks. Single-click slowly. Any counted double-click points to a worn switch.

Why test this

Buttons, the scroll wheel, and the left switch are the first parts of a mouse to wear out, and the trouble starts small. A side button that fires once in ten presses. A wheel that skips a notch. A left click that sometimes registers twice. This test checks all of them in one place, so you can tell a real hardware fault from a driver glitch or a bad in-game binding. Run it on a used mouse before you buy, on a unit that feels off before you file a warranty claim, or after a cleaning when you want to confirm nothing came loose. Every button reacts on screen the second you press it, so you can see right away whether a button is dead, stuck on, or just hidden from the browser.

What the results mean

Each button lights up green on the mouse diagram the moment it registers. Press left, right, middle, and both side buttons and watch them respond. A button that never lights up is dead, and one that stays lit is stuck. The two scroll counters count the steps your browser reports. Keep the pointer on the mouse and roll the wheel slowly one way. Every notch should add at least one step, and all of them should land in the same counter. A notch that adds nothing, or steps that keep landing in the other counter, point to a dirty or worn encoder, so try compressed air first. On a Mac with natural scrolling on, rolling up counts as Scroll down. That is the setting, not a fault. A trackpad or a high-resolution wheel sends many small steps, and a free-spinning wheel keeps counting after you let go, so a high count there is normal. The double-click counter should stay at zero. It only goes up when two left presses land within 50 ms, which is the classic sign of a failing switch, so click slowly and keep an eye on it. Note that many browsers reserve the back and forward buttons for navigation, so if your side buttons do not light up here, try another browser before you blame the mouse.

FAQ

How do I know if my mouse is double-clicking?

Click slowly once. If the double-click counter goes up without you clicking twice, the switch is likely failing. To time every click gap and confirm chatter, run the dedicated test: Double-Click Test

Why are my side buttons not detected?

Some browsers reserve back/forward buttons for navigation. Try a different browser if they do not register.

Is this mouse test free?

Yes. It runs entirely in your browser, needs no installation, and stores nothing.

Does the test work on a laptop trackpad?

Left, right, and scroll work on most trackpads. Middle and side buttons require a physical mouse.

Can I test polling rate here?

This tester focuses on buttons, scroll, and double-click. To measure the report rate in Hz, open our dedicated tool: Mouse Polling Rate Test

Embed the mouse test on your site

Building a mouse review or a buying guide? Put the mouse test on the page so readers check their own buttons and scroll wheel in place. One snippet of code, and every press lights up the moment it registers.

Want the whole set on your pages? See every tool you can embed →