Touchscreen test
Test a touchscreen and count how many fingers it registers at once.
Touchscreen test
Touch the test area with one finger, two, or all ten, and this tool logs every contact the browser reports through Pointer Events. It draws a trail for each finger and numbers the active ones, so a dead zone, a lagging edge or a finger that stops registering is easy to see. Pens and mice are logged separately from fingers.
Read the report from the top. The finger touches line counts how many times a finger went down, and the most fingers at once is the figure that matters for multi-touch: one finger means single-touch, two or more is enough for pinch and rotate gestures, five or more is full multi-touch, and ten is the usual maximum of a phone or tablet. Pick a target of 5 or 10 and the report says how many more fingers you still need to put down to reach it.
A browser can only report what the operating system passes on. Pressure and tilt show up as reported only if your screen or pen sends values other than the defaults, and many finger-only screens never do. The number your device lists as its maximum is shown as well, but the real limit can be lower with a screen protector, a wet screen or a palm resting on the glass. Some browsers also claim gestures such as three-finger swipes before the page sees them.
Nothing is uploaded or recorded. The test area reads touches inside your browser, the log is plain text you can edit or paste, and clearing the page forgets it all.