Multi-Touch Tester
See how many fingers your screen tracks at once — observed, not merely declared.
Put as many fingers on this area at once as you can. Keep fingertips well apart — a palm edge triggers rejection and costs you a point.
best: 0
How this test works
Every touch that lands on the pad is tracked as a separate pointer and drawn with its own colour and number, and the page keeps the highest simultaneous count it has seen. The distinction the tool insists on is between what the platform declares and what actually happened. navigator.maxTouchPoints is a specification of the digitiser, and most multi-touch pages print it as though it were a result — so a device claiming ten gets a confident ten whether or not a single finger was ever tested. Here the declared figure is shown as a claim beside the observed count, and a gap between them is explained as usually being the hand rather than the screen, because getting ten fingertips onto a small panel without a palm edge triggering rejection is genuinely hard.
What the results mean
- Touch points observed
- The most fingers tracked simultaneously. The only number here that was actually tested.
- Platform declares
- navigator.maxTouchPoints. What the device claims its digitiser supports.
- A gap between them
- Usually the hand. Palm rejection drops a point the moment an edge of the hand lands on the glass.
- Zero declared
- Common on desktop browsers even with working touch hardware. Not proof of absence.
Common problems and fixes
- I cannot reach the declared number of points
- Spread fingertips well apart and keep the rest of your hand off the glass. Palm rejection is aggressive by design and removes points without warning.
- Points disappear when I add more fingers
- Either the digitiser's limit was reached, or rejection has decided part of the contact is a palm. Lifting and replacing with more separation usually distinguishes them.
- It reports zero on my touchscreen laptop
- Some desktop browsers do not surface touch capability even where it works. Try a different browser before concluding the digitiser is at fault.
Frequently asked questions
What does navigator.maxTouchPoints actually tell me?
What the platform claims the digitiser can track. It is a declaration, not a measurement, and it is why this page shows it beside an observed count rather than in place of one.
Why do I lose a touch point when my palm rests on the screen?
Palm rejection. The digitiser and the OS classify large or oddly shaped contacts as accidental and suppress them, which frequently removes a legitimate fingertip nearby at the same time.
How many touch points should a screen support?
Five is common on laptops and tablets, ten on phones and better tablets, and some digitisers go further. More than about five is rarely used by anything outside music and drawing applications.