Mouse Tester
Test every mouse button online: left, right, middle and side buttons light up on a mouse graphic, with press counters, a scroll check and a double-click detector.
Processed entirely in your browser — nothing you enter here is ever uploaded.
Result
About this tool
Files keep opening when you meant to select them, drag and drop releases mid-way, or the browser jumps back a page on its own? Those are classic symptoms of a worn mouse switch, and this tester shows exactly what your mouse sends: click inside the test area and every button lights up on the mouse graphic with its own press counter.
The double-click detector is the heart of the tool. Every time you click, it logs the interval since the previous click of the same button. A deliberate double-click lands around 150–500 ms; a healthy single click produces no short intervals at all. When the log shows gaps under 80 ms that you never intended, the switch is bouncing — the hardware fault behind a mouse that double-clicks by itself — and the entry is flagged so you cannot miss it.
The scroll test counts wheel steps up and down separately: spin the wheel slowly one notch at a time and compare the counters with what your finger did. A wheel that skips notches, counts backwards mid-scroll or registers nothing has a dirty or worn encoder. Side buttons (back and forward) are covered too — browser navigation is suppressed inside the test area so you can hammer them safely.
Everything runs locally on standard mousedown, mouseup and wheel events; nothing is recorded or uploaded. This page checks whether the hardware works — if you want to measure how fast you can click instead, our CPS test is the speed game for that.
Example. A left click increments the left-button counter, and a second click of the same button sooner than 80 ms is logged as suspected switch bounce.
Limit. Only left, middle, right, back, and forward buttons are tracked, and the event log keeps 20 lines.