Why this tool is useful
Use this tester when a mouse button double-clicks unexpectedly, the middle button is uncertain or a trackpad scroll gesture appears to reverse or skip.
Browser & Privacy · runs locally
Mouse and Trackpad Event Tester
Inspect pointer movement, primary and auxiliary buttons, double clicks and wheel direction inside a bounded browser test surface.
Ready. Your working data stays in this browser.
How it works
The test surface counts local PointerEvent, click, double-click and wheel signals. Coordinates and counters stay in memory and stop updating when the session is cleared.
Practical example
Move across the panel, click each available button and scroll in both directions. The summary reports observed button numbers, distance and signed wheel totals.
Validation
The calculation is deterministic and explains validation errors instead of silently changing invalid input.
Privacy boundary
Input and output remain in this tab. Copy and download happen through browser APIs without a server upload.
Result passport
Every run reports its tool mode, timestamp and input/output size so transformed data can be audited.