Browser-based mouse testing without the fluff
MouseDiag is built to help people check whether a mouse is actually working correctly, then practice the skills that matter once the hardware is confirmed.
What the site does
MouseDiag offers free browser tools for button testing, scroll input, polling rate, click speed, double-click detection, and DPI estimation. It also includes skill games for reaction time, aim, tracking, flicks, and timing.
Why it exists
Most people searching for a mouse test want a quick answer: is the hardware fine, is a switch failing, is the wheel skipping, or is the mouse just configured badly. The goal here is to give clear, fast, browser-based checks with honest expectations about what the browser can and cannot measure.
What MouseDiag is not
It is not a driver package, a firmware tool, or a replacement for hardware lab equipment. Some tests, like true end-to-end latency, still require external hardware. Where browser limits apply, the site is designed to say that directly instead of overstating precision.