Multi-Touch Coordinate and Pressure Test

Inspect concurrent touch, pen, or mouse pointers with IDs, coordinates, and pressure values exposed by the browser.

0 active touchesMaximum 0

Test area

Press the area below with a finger, pen, or mouse. Each contact appears as a circle with its identifier, coordinates, and pressure.

Press here with a finger, pen, or mouseTry placing multiple fingers at once

There are no active contact points.

Key features

Displays active contact points with distinct colors and numbers.
Shows each pointer's type, ID, area-relative coordinates, and pressure value.
Counts current contacts and the maximum concurrent contacts in the session.
Also displays pen and mouse input received through Pointer Events.

How to use

Press the test area with a finger, pen, or mouse.
Move multiple fingers together and inspect contact count, coordinates, and pressure.
Release the contacts and reset the maximum count if needed.

Examples

Check multitouch contacts
Place several fingers on the area and inspect current and maximum concurrent contact counts.
Inspect pen or touch coordinates
Move pointers and review their area-relative coordinates, IDs, types, and exposed pressure.

Privacy

Pointer events and measurements remain in the current page's browser state and are not sent to a server.

Requirements

Multitouch behavior depends on touch hardware and the browser's Pointer Events implementation. Many devices do not expose real pressure and may report zero or a fixed value.

Common questions

Why is pressure zero or constant?: Many touch devices do not expose real pressure to the browser. This tool only displays the PointerEvent value clamped from 0 to 1; it does not measure pressure independently.
Is the maximum contact count saved?: No. It lasts only for the current page session and is cleared by Reset or a page reload.