MouseTester — Mouse Test in your browser

Quickly test left/right/middle clicks and the scroll wheel from your toolbar. More tools at mousetester.xyz.

MouseTester is a tiny mouse-test utility for your toolbar, powered by mousetester.xyz. WHAT IT DOES • Click the toolbar icon to open a popup with a live mouse diagram • Detects left, right, middle button presses, and scroll-wheel direction • Each press lights up the corresponding part of the mouse in real time ONE-CLICK ACCESS TO MORE TOOLS The popup also links out to the full toolbox on mousetester.xyz: • CPS (clicks per second) test • Double-click test — detect chatter / switch bounce • Polling rate test (Hz) • DPI accuracy test The links automatically open in your preferred language (English, 简体中文, 日本語, 한국어, Deutsch, Français, Español, Português). PRIVACY This extension does not collect, store, or transmit any data. It requests no permissions, has no background script, and does not read any web page. OPEN SOURCE & FREE Made by the team behind mousetester.xyz. Free and ad-free inside the extension itself.