Understanding the result
Continuous strokes show where pointer events reached the browser. A repeatable gap in the same area may justify checking the screen with another app or system diagnostic.
Mobile checks
Touch Screen Test
Drag a finger across the test area. A continuous line helps you spot a region where the browser stops receiving touch input.
Strokes: 0
A mouse can draw too; use a finger to test the touchscreen.
The test only shows touches delivered to this browser; system gestures and damaged glass can affect the result.
How to use this tool
- Open this page on a touchscreen.
- Drag slowly across the whole pad, including corners.
- Clear the drawing and repeat along any suspicious area.
Troubleshooting
- Use a finger rather than a mouse and start away from edges reserved for system gestures.
- Remove a thick protector or clean moisture from the screen if touches are erratic, then compare in another app.
Browser and device limitations
The page sees browser-delivered touches only; it cannot distinguish a damaged digitizer from operating-system filtering or gesture interception.
RELATED TOOLS
All toolsKeep checking
Multi Touch TestCount simultaneous fingers detected by your touchscreen.Open toolVibration TestTry a short vibration pattern on a supported phone.Open toolGyroscope TestWatch orientation values change as you turn your phone.Open toolAccelerometer TestSee motion values while moving your phone.Open toolStuck Pixel FixerRun a small changing-color patch over a suspected stuck pixel.Open tool
Common questions
Why do lines stop at the edge?
The browser may reserve edge gestures for navigation. Try starting slightly farther inside the test area.
Can I test with a mouse?
A mouse can draw too, but it cannot tell you whether the touch layer works.
Does a drawn line prove pressure sensitivity?
No. The test checks positions delivered to the page and does not grade pressure sensitivity.