Touchscreen Test
Touch and drag inside the box below. Try multiple fingers at once to test multitouch support and check for unresponsive areas.
Touch area
Checking touch support…
How to use the touchscreen test
Touch and drag your finger anywhere inside the dark box above — a green trail should follow your finger precisely. Try using two or more fingers at once to test multitouch support, and check the "active touches" and "max simultaneous seen" counters.
Why test your touchscreen
Touch accuracy can degrade in specific spots — often near screen edges or around a cracked area — without being obvious during normal use, since you naturally avoid tapping where it doesn't work. This test is useful after a screen repair, or when buying a used phone or tablet.
Troubleshooting touch issues
- Whole screen unresponsive: often points to a digitizer (touch sensor layer) failure, separate from the display itself — this typically needs a hardware repair.
- Only certain areas don't respond: commonly caused by a screen protector bubble, a crack, or moisture trapped under the glass.
- Touch registers in the wrong location: can indicate a calibration issue or physical damage to the digitizer layer.
- Multitouch not working: confirm your device's hardware actually supports multitouch — some older or budget devices are limited to single-touch.
Frequently asked questions
Does this record my touch input?
No. Touch coordinates are used only to draw the trail on this page and are never recorded or transmitted anywhere.
How many touch points can this test detect?
It supports as many simultaneous touch points as your device's hardware and browser report — most modern phones and tablets support 5 or more.
Can I test this with a mouse on a laptop?
Yes — a mouse fallback is built in, so you can click and drag to see the trail even without a touchscreen, though it will only register a single point at a time.