Mobile diagnostic tool

Network & Latency Test

Check connection hints and perform lightweight latency and download tests without installing an app.

Latency—milliseconds

Download estimate—Mbps

Connection hint—Browser estimate

Direct answer

What is the Network & Latency Test – Phone, Laptop, Desktop & TV?

Run lightweight browser-based network latency and download checks on phones, tablets, laptops, desktops and compatible smart TVs.

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

Understanding the result

This is a practical browser estimate, not a certified ISP speed test. Server distance, caching, browser limits and temporary network conditions affect results.

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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.