Screen & device info

Check your screen resolution, viewport size, pixel ratio, color depth, touch support, CPU cores, and device memory as websites see them.

Free tool

Screen Resolution Checker

This page shows your display and device signals exactly as JavaScript reports them to any website: physical resolution, the viewport your browser actually renders into, pixel density, and hardware hints.

Screen & device info

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Why is my viewport smaller than my screen resolution?

The viewport is the area inside the browser window after toolbars, scrollbars, and OS bars take their share. Sites lay out pages against the viewport, not the full screen.

What is device pixel ratio?

How many physical pixels the display packs into one CSS pixel. A ratio of 2 or 3 means a high-density screen, which is why images sized for ratio 1 can look soft on modern phones.

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