Mouse Button Tester

This mouse tester listens to your browser's mouse events to check each button, the scroll wheel, and the timing between clicks, all in one place. Click inside the test area with your left, right, or middle button, or with a side button if your mouse has one, and the matching button on screen lights up and its counter goes up. Scroll up or down inside the same area and the wheel counters move with it, so you can confirm the wheel reads both directions cleanly.

Double-click timing is where most mouse problems actually show up. Every time you click the same button twice, the tool measures the gap between the two clicks in milliseconds and adds it to a short history list. A real double-click from a person almost never lands under about 80 milliseconds. When a gap that short shows up on its own, without you trying to double-click, it usually means the switch inside that button is wearing out and firing extra clicks by itself, a fault commonly called switch chatter.

Right-click is tested the same way as any other button, and the test area blocks the normal right-click menu so the click registers instead of opening a browser menu. Everything is calculated on the page as you click; no click data is saved or sent anywhere. Reset the counters whenever you want to start a clean run, for example after testing a second mouse for comparison.