Touchscreen test
Trace continuous lines, inspect edge coverage and observe simultaneous touches.
Draw across the grid and around each edge. Try several fingers, then record visible gaps.
Enable JavaScript to run this interactive test. The guide and methodology below remain available.
How to run this check
Draw across the grid and around each edge. Try several fingers, then record visible gaps.
Understand the result
PASS describes a received signal or your recorded observation. WARNING calls for another check. USER REVIEW REQUIRED means a measurement alone cannot decide. An unavailable API or denied permission does not establish hardware failure.
What this cannot tell you
Coverage reflects received touches in the test surface only. The browser cannot know your intended touch path.
If something seems wrong
Clean and dry the screen. Remove an interfering protector and compare another touch app.
Find troubleshooting help →Good to know
Is anything uploaded?
Raw diagnostic input and media are processed locally. Results remain in this page’s memory until you download a report or leave. Hosting requests still reach the site host. See the privacy policy.
Does a pass guarantee my hardware is healthy?
No. It records behavior observed in this browser session. Intermittent faults, internal components and operating-system restrictions need further investigation. See our methodology.