Touchscreen Test
Touch or drag across a grid to map responsive cells, coordinates and coverage percentage.
How to use this test
Use a real finger on the test grid and drag across different areas of the screen. Touched cells remain highlighted so you can map coverage before resetting.
How the measurement works
The page accepts only PointerEvent input whose pointerType is touch, converts touch coordinates into grid cells and records coverage percentage.
How to interpret results
Untouched cells are not automatically faulty; deliberately cover the whole grid. Repeatedly unresponsive regions in the same physical area may justify testing another app or hardware diagnostic.
Troubleshooting tips
Remove gloves, clean the display and temporarily remove a problematic screen protector. Mouse clicks are intentionally ignored because they do not validate touchscreen hardware.
Related tests
You can also browse every utility from the complete tool index.
Common touchscreen questions
How do I test for dead zones on a touchscreen?
Drag a finger slowly across every grid region and repeat any area that does not respond. A physical region that fails consistently across repeated passes and other apps is more meaningful than one missed cell.
Read full answer →Why does the touchscreen test ignore my mouse?
The tool deliberately accepts touch pointers only. Allowing normal mouse clicks would create a false pass on a device whose physical touch sensor is not working.
Read full answer →Can a screen protector affect touchscreen response?
Thick, damaged or poorly fitted protectors can sometimes reduce touch sensitivity or create difficult edge interactions. Compare results with normal device apps before concluding the digitizer is defective.
Read full answer →Can I test the touchscreen with a mouse?
No. Mouse input is deliberately ignored because clicking with a mouse would not validate the physical touch sensor.
Read full answer →