Touch Screen Test
Draw with your fingers to check touch paths and grid coverage. See the simultaneous touch contacts reported by your browser, with separate mouse and pen demonstrations.
- Continuous finger trails and a 100-cell coverage grid
- Current and highest simultaneous touch counts
- Separate mouse and pen demonstration coverage
- Fullscreen workspace with a clear exit
Current touch contacts
0
Peak simultaneous touches
0
Touch coverage
0/100
Sweep a finger through the grid
Use fingers for the touch count. Mouse and pen are demonstrations.
Fullscreen opens a larger workspace; browser bars may remain on some devices.
How to use
- Open this page on the device you want to check. Enter fullscreen for a larger working area.
- Slowly sweep a finger through every grid cell. Green cells received touch input; empty cells have not been covered.
- Place several fingers at once and move each finger. Compare the current count with how many contacts you made.
- Repeat unexpected gaps in another direction. Clear the grid to start again after rotating or resizing the working area.
What to keep in mind
This page shows browser-reported pointer events, not a hardware diagnosis. Uncovered cells are not confirmed dead zones. System gestures, palm rejection and the browser can limit contacts or interrupt paths. The grid checks the working area, not browser chrome or the tool controls.
Questions
Does mouse input count as multi-touch?
No. Only events identified as touch count toward current and peak contacts or green touch coverage. Mouse and pen paths are shown separately.
Does a blank cell mean my screen is broken?
No. It means no touch path has been recorded there in this run. Sweep it again slowly and compare another app before drawing conclusions.
Why did a finger trail stop?
The system or browser may have intercepted a gesture or cancelled a pointer. Lift all fingers and repeat. Switching tabs, resizing and changing fullscreen clear active contacts.