Touchscreen Dead Zone Test
Use a grid overlay to inspect areas that do not respond to touch.
Touch the grid
Drag around the full screen area. Pointer events are shown locally.
Active touches0
Max simultaneous0
Pointer updates0
Taps / last hold0 / —
Orientation—
Slowly cover every grid region. A browser cannot automatically prove a physical digitizer defect, but a repeatable unresponsive region across apps is useful evidence.
What happened?Choose the result you observed.
Privacy: Test input is processed in your browser where possible.
What this test tells you
This test checks
- Screen coverage
- Missed areas
How to read the result
A passing browser test confirms that the browser can observe this input/output path.
A failing test narrows the issue but does not by itself prove physical hardware failure.