Mobile diagnostic tool

Multi-Touch Tester

Place several fingers on the test area to check multitouch support, tracking continuity and screen coverage.

Touch anywhereUse two or more fingers and trace the edges and corners.

Waiting for touch—

Direct answer

How many touch points can this test detect?

The tester shows every simultaneous touch point reported by your browser and records the maximum reached. The result depends on the device, operating system and browser.

✓ No installation✓ Works in compatible browsers✓ Privacy-focused testing

Testing checklist

Drag one finger slowly across every edge and corner.
Place multiple fingers down together and verify each gets its own marker.
Try pinch, spread and rotation gestures.
Broken lines or disappearing points may indicate a touch dead zone.

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Move between screen, camera, audio and device checks without returning to the homepage.

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Dead Pixel TestInspect solid colors for dead, stuck, bright or dark pixels. Touch Screen TestCheck touch coverage, dragging continuity and dead zones. Keyboard TesterTest a full-size keyboard and confirm every key press. Mouse TesterTest buttons, wheel, movement, dragging and double-clicks. Audio TesterCheck speakers, stereo channels, tones and microphone input. Camera & WebcamTest built-in, USB, phone, tablet and compatible TV cameras. Microphone TesterView microphone levels, waveform, recording and playback. Pixel ExerciserExercise a suspected stuck-pixel area with changing colors. Gradient TestInspect gradients, tonal transitions and visible banding. Brightness & ContrastCheck black levels, white saturation and contrast separation. Screen Size TestView viewport, resolution, pixel ratio and display data. Text SharpnessInspect text rendering, browser scaling and clarity. Motion & GhostingObserve motion blur, ghosting and response behavior. Resolution & ScalingCheck screen resolution, CSS pixels and scaling. Device InformationReview screen, browser, hardware and platform information. Browser CapabilityCheck which browser APIs and hardware features are supported. Network TestCheck connection status, latency and estimated download speed. GPS & LocationTest browser geolocation, accuracy, altitude and speed. Sensor TesterTest orientation, motion, acceleration and rotation sensors. Multi-Touch TesterTrack multiple touch points, pinching and rotation gestures.