Mouse Tester
Click any button to test it — with double-click bug detection, scroll and sensor checks.
Left: 0
Middle: 0
Right: 0
Back (4): 0
Forward (5): 0
Scroll ↑: 0
Scroll ↓: 0
Click, scroll and hold buttons inside this panel. Right-click menu is suppressed here.
Sensor tracking
Draw slow circles — gaps or straight jumps in the line reveal sensor skipping.
Double-click detector
Any second click within 80ms of the last one is flagged — real human double-clicks are slower. Flags: 0
How it works
Every part of your mouse gets its own check. The five button zones light up on the mouse graphic as you press them and count each click — including side buttons 4 and 5 where the browser exposes them. The scroll counters increment per wheel step in each direction, so a skipped or reversed step (a failing wheel encoder) shows up immediately as a count that doesn't move or moves the wrong way.
The double-click detector watches the interval between consecutive presses of the same button. A worn micro-switch "bounces", firing two clicks from one physical press within a few milliseconds — our 80ms threshold is far below intentional double-click speed, so any flag is a strong sign of the infamous double-click defect. The tracking canvas draws your raw pointer path; a healthy sensor produces a continuous line, while jumps and gaps at slow speeds indicate sensor skipping or a dirty lens. All processing happens locally in your browser.
Troubleshooting
› Right-click opens a menu instead of registering
The test arena suppresses the context menu while your pointer is inside it. If a menu still opens, click once inside the arena first so it has focus.
› Buttons 4 and 5 don’t register
Browser support for side buttons varies, and some mice map them to Back/Forward at driver level. Try disabling gestures in your mouse software, then test again.
› The double-click detector flagged my mouse — now what?
Repeated flags on a single physical click mean switch bounce, a hardware fault. Cleaning with contact cleaner sometimes helps; otherwise the switch needs replacing.
Frequently asked questions
› Which mouse buttons can I test?
Left, right, middle (wheel click), and side buttons 4 and 5, plus scroll up/down and pointer tracking.
› What is the double-click bug?
A worn switch “bounces”, sending two clicks for one press. Our detector flags any second click that lands within 80ms of the previous one — far faster than a human double-click.
› Can I test my scroll wheel?
Yes — scroll inside the arena and watch the up/down counters. Skipped or reversed steps indicate a failing wheel encoder.
› Is my mouse data private?
Completely. All events are processed in your browser; nothing is recorded or uploaded.