Touch Screen Test
Check multi-touch points, grid coverage, edges, and draw continuity using touch pointer events.
Tests run locally in your browser. We do not upload keystrokes, pointer paths, or media.
Best on phones/tablets. Mouse input is rejected for true touch results.
Important
- Mouse simulation is not a touch-screen test. Untouched cells are not automatic faults.
Results
- Session
- Ready
- Grid coverage
- 0%
- Max simultaneous
- 0
- Completed paths
- 0
- Cancelled paths
- 0
- Cancelled / lost events
- 0 / 0
- Draw break hints
- 0
- Mouse rejects
- 0
- Edges (T/B/L/R)
- —
- Corners (TL/TR/BL/BR)
- —
- Untouched cells
- 1
Draw paths stay visible after finger lift and Stop freezes the session. Switching modes resets metrics so modes do not contaminate each other.
How to use
- Open on a touch device.
- Use Grid, Draw, Edge, or Multi-touch modes.
- Cover cells, edges, and corners; watch multi-touch IDs.
- Restart to clear coverage.
What the result means
- Grid coverage is how many cells received touch events.
- Cancelled/lost counts come from pointercancel / focus loss.
- Untouched areas are candidates to retest, not automatic defects.
Limitations
- OS gestures may cancel touches on iOS Safari or Android Chrome.
- Mouse simulation is not a valid touch-screen test.
- Does not measure hardware touch sampling rate.
Troubleshooting
- Page scrolls while drawing
- Use the marked surface (touch-action: none) and fullscreen when possible.
Related tools
Dead Pixel Test
Cycle solid full-screen colors so you can look for dark or stuck pixels. You record what you see.
Refresh Rate Test
Estimate the current browser presentation timing from requestAnimationFrame intervals.
Mouse Test
Check mouse buttons, hold stability, movement path, and basic wheel events using the browser Pointer Events API.
FAQ
Why is /touch-test missing?
The official URL is /touch-screen-test. The short slug is intentionally not published.