How to use the Mouse Test
- Move the pointer into the box and click each button — the matching part of the mouse lights up and turns green once it works.
- Scroll up and down; the counters and the scroll type (notched or smooth) update.
- Click the left button slowly several times: any “suspected double-click” means the switch is bouncing.
Spotting a worn switch
When a mouse switch wears out, one press can register as two clicks a few milliseconds apart — files open when you meant to select them, and drags drop early. The test flags any two clicks of the same button less than 80 ms apart, far faster than people click on purpose.
Scroll wheel
A notched wheel sends steps of about 100 pixels (or 3 lines); a smooth wheel or trackpad sends many small steps. A wheel that sometimes scrolls the wrong way usually has a dirty or worn encoder.
Measuring speed instead? Try the Click Speed Test or the Mouse Polling Rate Test.
Also searched as: mouse button test, mouse click test, double click test, scroll wheel test, mouse checker, mouse double clicking problem, test mouse online.
Tools that pair well with the Mouse Test
- Trackpad Test — Check that your laptop trackpad / touchpad works: click and tap, two-finger scroll in every direction, pinch to zoom, two-finger right-click and drag.
- Keyboard Tester — Press every key and watch it light up on the on-screen keyboard — find dead, stuck or repeating keys, see the key and code for each press, and check how many keys register at once.
- Reaction Time Test — Click (or tap, or press Space) the moment the box turns green.
- Mic Test — Check that your microphone works and sounds right before a call, stream or recording — see the live level, watch the waveform and play back a short test recording.
Frequently asked questions
Why don’t my side buttons register?
Some mice need their own software to send standard back/forward events. Most browsers report them as buttons 4 and 5, which this test shows as Back and Forward.
How do I fix a mouse that double-clicks?
It’s usually a worn switch. Cleaning can help for a while; replacing the switch or the mouse is the lasting fix. Check the warranty first.
Is anything uploaded or recorded?
No. Everything runs in your browser; results and settings are kept on this device only.
Can I install Mouse Test as a web app and use it offline?
Yes. Mouse Test is an installable web app (PWA) — installed from your browser, not downloaded from an app store. Click Install app at the top of this page in Chrome or Edge (Windows, macOS, Linux, ChromeOS) or on Android, use Share → Add to Home Screen on iPhone and iPad, or File → Add to Dock in Safari 17+ on a Mac. It then opens in its own window with its own icon, and because it runs entirely in your browser it keeps working offline. Firefox on desktop can’t install web apps. How installing works.