This page reads your touchscreen the same way a game or an app would: through the browser's built-in Touch API. Nothing here is a guess — every dot and every number on screen comes straight from what your browser hands back for each finger.
How to run the test
Rest one finger on the black area above. A dot appears exactly where you touched, and a card below it lists what the browser knows about that touch. Move your finger and the dot follows it. Lift it and the dot disappears.
Now try more fingers at once. Two, three, however many you can fit — each one gets its own dot and its own numbered card, tracked independently. That is what multitouch means: the browser telling several fingers apart at the same time, not just noticing that "something" is touching the glass.
What each reading means
Position
The X and Y coordinates of that finger on the page, in pixels, updated live while you move it. This is the same data a webpage would use to draw a line under your finger or scroll a list.
Size
Some touchscreens and browsers report how large the contact patch is — a wider oval for a flat fingertip, a smaller one for a fingernail or a stylus. Many browsers and devices do not measure this at all, and simply report a fixed, non-measured size no matter how you touch. When that happens this page says so — not reported — instead of showing you a number that would just be the browser's placeholder, not a real measurement.
Pressure
Called force in the Touch API, from 0.0 (no data) to 1.0 (a "normal" press). Very few touchscreens actually measure how hard you are pressing — most only know where you touched, not how firmly. If your device does not support it, the browser reports 0 for every touch, and this page shows not reported rather than a misleading "0% pressure".
Why a screen sometimes does not respond
A dot that never appears where you expect, or does not appear at all, can have a few different causes:
Screen protectors and cases. A thick or poorly fitted screen protector can dull touch sensitivity, especially right at the edges. Gloves usually do not work at all on capacitive touchscreens, since they read the small electrical charge in your finger, not physical pressure.
The very edge of the glass. Touch sensitivity is often weaker in the last few millimetres near the frame — try testing a bit further in.
Too many fingers at once. Every touchscreen has a limit on how many points it can track at the same time. Beyond that limit, extra fingers are simply ignored until you lift one.
The browser or OS grabbing the gesture first. A three-finger swipe or a pinch can be intercepted by the operating system for its own gestures (like switching apps) before this page ever sees it.
What a browser cannot test
The Touch API gives a webpage position, and size or pressure when the hardware and browser support it — nothing more. It cannot check hover or proximity sensing above the glass, it cannot verify a stylus's tilt or button, and it cannot measure real physical force in grams — only the browser's own 0.0–1.0 estimate, when it offers one at all. If your screen needs those specific features tested, that has to happen outside a browser.
Questions people ask
Does this work with a laptop trackpad?
No. A trackpad is not a touchscreen — it does not read touches on the display itself. This test needs a touch-enabled screen: a phone, tablet, or a touchscreen laptop or monitor.
Why does it say "not reported" for size or pressure?
Because your browser or touchscreen genuinely did not provide that data. Rather than invent a number, this page tells you plainly when a reading is missing. That is a limitation of the hardware or browser, not a fault in your screen.
How many fingers can I test at once?
As many as your screen and browser can track — this page has no built-in limit of its own. Most modern phones and tablets track at least five or ten points at once.
Is anything uploaded or stored?
No. Every touch is read and drawn by JavaScript running in your own browser. Nothing about your screen or your fingers is sent anywhere.