Touch Screen Test

Count how many fingers your screen can follow at once, and find spots that don't respond.

  1. Put one or more fingers on the box below.
  2. Add fingers one at a time and watch the count.
  3. Drag slowly across every part of the box to look for gaps in the line.

Touch, drag or draw here.

Touching now: 0 Most at once: 0 Screen reports: –

Testing the whole screen

The box covers most of the page, but the very edges of your screen sit outside it. Rotate your device to test the other direction, and scroll the page above the box if you need to reach its top edge.

How the touch screen test works

Each finger gets its own coloured ring that follows it around the box, so you can see exactly what the screen detects. Every finger also leaves a line behind. A healthy screen draws smooth, unbroken lines; a damaged area shows up as a gap, a jump or a line that wanders off on its own.

"Screen reports" is the number of touch points your device says it supports. "Most at once" is what you actually managed. If you can't reach the reported number, the screen or its driver may be dropping touches.

Finding a dead zone

  1. Clean the screen and take off thick gloves or a damaged screen protector.
  2. Draw slow horizontal lines from top to bottom, close together, then do the same vertically.
  3. Look for gaps. A strip where lines break at the same place every time is likely a hardware fault.
  4. Restart the device and test again, to rule out a software glitch.

Frequently asked questions

How many touches should my phone support?

Most modern phones and tablets follow at least five fingers at once, and many follow ten. Touch laptops usually support ten.

Can I use a mouse or stylus?

Yes. A mouse or pen draws a line too, which helps check a stylus for skips. Only fingers test multi-touch.

My screen says 0 touch points.

Your device doesn't have a touch screen, or its touch driver isn't working. On Windows, check Device Manager under Human Interface Devices.