Touchscreen Test Online — Touch Grid & Multi-Touch

Touchscreen test

Press Start full-screen test, then trace every area with your finger, including the edges. No buttons cover the grid during testing. Return appears after all 48 areas receive touch input. To leave early, use your phone or browser Back action, or Escape on a keyboard. Browser bars may remain on unsupported devices.

0 / 48Cells touched

0Active touch points

0Most simultaneous touches

Ready for touch input.

A filled grid shows where touch input was received, not a hardware health score.

What did you observe?

Run the test before recording an observation. You can skip an unavailable test.

Next test →Review checklist

Your observations stay in this browser tab. You can clear them below.

How to use this tool

Open this page on the touchscreen device and press Start full-screen test. Trace the grid with a finger, covering the center, corners and edges.
Try several fingers together, then lift them. Continue until all 48 areas show a touch mark. Mouse and stylus input remains a separate preview.
After the last touch is lifted, choose Return to results to review coverage and the maximum simultaneous touch count. Use phone or browser Back, or Escape, to leave early.

Understanding your results

Filled cells show received touch input. Empty cells may simply be untraced areas. The maximum count is the number of simultaneous finger contacts reported in this test, not the device’s advertised hardware limit.

Look for gaps in touch input

Move slowly across the grid, covering the center, corners and edges. If a line consistently stops in the same place, clean and dry the display and your hands, then repeat. A screen protector, case edge, system gesture or browser behavior can interrupt input. Compare with normal use in another app before treating a repeated gap as a hardware fault.

What a multi-touch test measures

Touch points are counted while fingers are down inside the test area. The largest observed count is kept until you reset. Browser and operating-system gestures can reserve some combinations, so the number shown is not a specification or certification. A mouse or stylus is labeled as a preview and does not fill the finger-touch result.

Test the full viewport, then return to your results

Start full-screen test expands the grid across the available display without floating buttons over it. The return control appears only after all 48 areas receive finger input and you lift your fingers. Use the phone or browser Back action, or Escape, to leave earlier. Where native fullscreen is unavailable, the grid covers the browser viewport; browser bars, cutouts and reserved system gestures can leave inaccessible areas. Rotating or resizing starts fresh coverage. No touch coordinates are sent to our server.

Questions, answered

How do I leave the full-screen touchscreen test?

Complete the 48 areas and lift your fingers to reveal Return to results. To leave sooner, use your phone or browser Back action, or Escape on a keyboard. A keyboard-accessible exit is also available with Tab; it stays out of the touch grid during normal finger testing.

Can I check touch input with a mouse?

A mouse can preview the interface, but cannot test a touchscreen sensor. Mouse and pen preview cells are counted separately.

Does 48 of 48 prove the phone is fault-free?

No. It means touch input reached the grid cells during that attempt. Intermittent problems, other screen areas and hardware details need separate inspection.

Online Touchscreen Test