Touch & input
Interactive · Runs in this browser
Use one or more fingers to draw directly across a full touch surface. The tool records active pointers, touch coordinates, movement paths, maximum simultaneous contacts, event count, and grid coverage without saving the drawing.
Drag one or more fingers across the surface. Each pointer gets its own path, and coverage is estimated across a 24 × 14 grid. Mouse and pen pointers work too.
The drawing itself is visual. Live path, active contact, and coverage totals are reported below it.
Transparent method
This tool reports only interactions and browser APIs it can observe. It does not infer hidden hardware specifications or turn unsupported access into made-up results.
Useful context
Drawing slowly across every grid cell can reveal areas where the browser receives no pointer events, but it cannot diagnose the physical cause.
Yes. Pointer Events also support a mouse or pen, and the tool labels the detected pointer type.
Troubleshooting
Keep checking