Mouse Button Tester is a free device test tool that runs entirely in your browser — every button & the scroll wheel. No upload, no account, no limits.
Confirm every button on your mouse and the scroll wheel are working. Press buttons on the pad and they light up on a mouse diagram and in the legend; detected buttons stay highlighted, and scroll ticks and double-clicks are counted.
Left, middle, right and the two side (back/forward) buttons are all tracked, and the right-click context menu is suppressed so testing stays smooth.
Many mice and most trackpads don't expose back/forward to the browser, or they're mapped to navigation. If they never register here, the page simply isn't receiving them.
Yes — scrolling over the pad registers up/down ticks and lights the wheel on the diagram.
Every calculation happens on this page, in your own browser. Your input is never sent to a server, never logged and never used for training — which also means the tool keeps working when you are offline.