About the Mouse Tester.
ToolCheckup's mouse suite is a set of free testing tools that run entirely in your browser. Measure your clicks per second, check every button and the scroll wheel, catch a double-clicking switch, estimate your polling rate, and back-calculate your DPI — without installing anything or sending a byte of data anywhere.
What these tools are for
A misbehaving mouse is hard to pin down: is the switch worn, the cable loose, the driver confused, or is it just your hand? Each tool here isolates one measurable thing — click rate, button events, the millisecond gap between clicks, report interval, wheel notches — so instead of guessing you can read a number. Everything is built on standard browser events (Pointer Events, the mouse and wheel APIs), works on Windows, macOS, Linux and ChromeOS, and is free, supported by readers who buy us a coffee.
Privacy, in one paragraph
Every test runs on your device. We read the same pointer, button and wheel events your browser already hands to any web page — there is no recording, no fingerprinting, and nothing uploaded. Your best scores and settings live in your browser's local storage and never leave your machine. See the privacy policy for the boring details.
Found a bug? Want a tool?
Tell us what broke (with your browser + OS + mouse model) or what you'd like tested next — we read everything.
Site FAQ
Is the Mouse Tester really free?
Yes — every tool, no paywall, no sign-up. The site is supported by voluntary donations ("buy me a coffee") and may show unobtrusive ads that never cover or push down a test.
Do these tests read anything about my mouse hardware?
No. Browsers don't expose your mouse's make, model, firmware, or its true DPI and polling rate to a web page. Every figure here — CPS, report rate, DPI — is measured indirectly from the timing and movement of the events your browser delivers, so treat them as good estimates, not spec-sheet readings.
Why can a browser test only estimate polling rate and DPI?
The browser sits several layers above the USB port. It can coalesce several hardware reports into one event, throttle events to the display's refresh rate, and it never sees raw sensor counts. That's enough to spot a 125 Hz mouse from a 1000 Hz one, or a wildly wrong DPI setting, but not to certify an exact number. Each tool says plainly where its limits are.
Which browsers work best?
Any modern browser: Chrome, Edge, Firefox, and Safari on desktop. A few tools (polling rate, high-resolution movement) are most accurate in Chromium-based browsers, which expose more timing detail. Touch devices without a physical mouse can't run the button, polling or DPI tests meaningfully.
Can I link to or embed these tools?
Linking is always welcome. Embedding the pages in iframes isn't recommended — some browsers restrict pointer capture and event timing inside frames, which skews the measurements the tools depend on.