Advanced Mouse Tester
Every mouse test in one place: buttons, chatter, double-click, CPS, scroll wheel, drag & drop, DPI, polling rate, reaction time, aim accuracy and hand steadiness. No installs, no server uploads — everything runs live in your browser.
Hold Shift while scrolling (or use a trackpad) to test horizontal scroll detection.
Double-click anywhere in the pad above (Click & Button Test section) — the interval between your two clicks is measured automatically below.
ME
HERE
Estimate only — actual on-screen pixel travel is affected by OS pointer acceleration and display scaling, so this won't exactly match your mouse's true hardware CPI/DPI.
Move your mouse continuously over the Click & Button Test pad above for an accurate reading. Jitter score flags erratic, uneven step sizes that can indicate sensor skipping.
The Complete Free Online Mouse Tester — Everything In One Page
This is a full mouse diagnostic suite built so you never need to leave the page or hunt down multiple tools. Test buttons, chatter, double-click timing, click speed, scrolling, drag reliability, DPI, polling rate, reaction time, aim accuracy and hand steadiness — then export a complete report of the results.
Everything runs locally in your browser using JavaScript. No downloads, no plugins, and no data is ever sent to a server — your clicks, scrolls, drags and cursor movement stay on your device the entire time.
Every Test Included
- Button test: Verify left, right, middle, back, and forward buttons all register a single, clean press.
- Double-click & chatter test: Measure the interval between two clicks in milliseconds, with an automatic warning if it looks like unintended switch chatter.
- CPS test: Measure click speed over 5, 10, 15, or 60 seconds.
- Scroll wheel test: Confirm vertical and horizontal scroll detection, plus the browser's reported delta mode.
- Drag & drop test: Check whether drags reliably register as a clean drop instead of dropping early or missing the target.
- DPI / sensitivity estimator: Get an approximate CPI/DPI reading from a known real-world distance.
- Polling rate & smoothness: Estimate move-events per second and flag erratic, jittery movement steps.
- Reaction time test: Measure how fast you click after a visual cue appears, averaged over five rounds.
- Aim accuracy trainer: A 10-second target-hitting drill with a live accuracy percentage.
- Hand steadiness test: Trace a straight line and get a deviation score and stability rating.
- Live event log & exportable report: See a raw timestamped feed of everything detected, then copy or download a full summary.
Why Test Your Mouse?
A worn-out microswitch is one of the most common mouse failures — it causes a single click to register as two, or a click to intermittently drop. A failing sensor can also cause skipped or jittery cursor movement. Running through every section here regularly can catch problems early, especially while a mouse is still under warranty.
Frequently Asked Questions
This usually indicates a worn-out microswitch. Use the button test grid and the double-click/chatter section — a flagged interval under roughly 60ms on what should have been a single press is a strong sign of switch failure.
Browsers cannot read raw hardware DPI/CPI or true USB polling rate directly. The DPI estimator and polling-rate reading here are both approximations based on on-screen pixel travel and browser move-events, and can be affected by OS pointer acceleration, display scaling, and browser throttling.
No. All click, scroll, drag, and movement detection happens locally in your browser with JavaScript. Nothing is uploaded or stored on a server — the report you download or copy is generated entirely on your device.
Some mice map extra side buttons to keyboard shortcuts or OS-level gestures instead of standard mouse button codes, so the browser may never see them as button 3/4. Check your mouse manufacturer's software to confirm the button mapping.
These drills mostly test human reflexes rather than the mouse itself, but a properly working, low-latency mouse should let your true reaction speed and aim show through without added lag from dropped clicks or cursor skipping.