Touch the canvas area below to test your touchscreen. Supports multi-touch detection and pressure sensitivity.
Touch the canvas with one or more fingers to see real-time touch point tracking.
Draw across the canvas to check for dead spots or unresponsive areas on your screen.
Multi-touch detection shows how many simultaneous touch points your device supports.
The most common technology is capacitive touch, used in smartphones and tablets. Your finger (which conducts electricity) disrupts an electrostatic field on the screen surface. Sensors at the corners measure the change in capacitance to pinpoint the exact touch location. Resistive touchscreens (used in some industrial devices) work by pressing two conductive layers together.
Modern devices support multi-touch, recognizing multiple simultaneous touch points. Most smartphones support 5-10 touch points. This enables gestures like pinch-to-zoom, two-finger rotation, and three-finger swipe. The touch controller processes all contact points simultaneously, reporting their positions at rates of 60-240 Hz (touch sampling rate).
Browsers provide several APIs for touch interaction: Touch Events (touchstart, touchmove, touchend) give detailed multi-touch data including touch identifier, coordinates, and contact radius. Pointer Events provide a unified API for mice, pens, and touch. This test uses Touch Events for direct multi-touch tracking, with a mouse fallback for non-touch devices.
Use this test to find out! Place all your fingers on the screen simultaneously and check the "Max Points" counter. Most modern smartphones support 5-10 touch points. Some drawing tablets support more.
Yes! If your laptop has a touchscreen, you can draw on the canvas with your finger. If it only has a trackpad, you can still use mouse input to test the drawing surface, though multi-touch is only available on actual touchscreens.
Common causes include: a dirty or wet screen surface, a screen protector interfering with touch sensitivity, electromagnetic interference from nearby devices, or using gloves (unless the screen supports glove mode). Clean your screen and try again.