Input Lab Display & touch

Screen Resolution Test

Check screen resolution, browser viewport, device pixel ratio, orientation and color depth with live resize updates and a fullscreen comparison for any display.

Runs locally No account Repeat freely
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Touch Screen TestCheck touch points, multi-touch capacity and screen coverage. Monitor Hz TestEstimate the frame rate the browser is actually presenting. Dead Pixel TestInspect the full screen for stuck, dead or discolored pixels. Tap Speed TestMeasure taps per second or use the unlimited touch counter.
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Screen Resolution Test Guide

How to use the screen resolution test

Read the live values, resize the window and optionally enter fullscreen. The page reports both the physical CSS screen bounds exposed by the browser and the usable viewport.

Understanding the results

Screen size describes the display coordinate space, viewport is the page area, and DPR is the ratio between CSS pixels and backing device pixels.

What this browser tool can measure

Browser zoom, display scaling and privacy protections can change reported values. CSS screen dimensions do not always equal the panel native pixel count.

Private by design

The interactive work happens locally in this browser. No account is required, and test inputs are not sent away to calculate the result.