Screen Info Detector

See your exact screen resolution, viewport, pixel ratio and more — live.

Resize your browser window — values update live.

Screen vs viewport

Screen resolution is your display's full pixel grid. Viewport is the browser window's current content area — what responsive websites actually design for. Device pixel ratio (e.g. 2x "Retina") means CSS pixels map to multiple physical pixels.

Frequently Asked Questions

Why is viewport smaller than screen?

Browser chrome (tabs, address bar, bookmarks) and OS taskbars take space; fullscreen mode maximizes it.

What is device pixel ratio?

How many physical pixels render one CSS pixel. DPR 2 = sharper 'Retina' display.

Is any data collected?

No — readings come straight from your browser's APIs and never leave your device.