What's the difference between screen and viewport?

Screen resolution is your monitor's full resolution. Viewport is the browser window's content area, which may be smaller.

Screen Size Detector

Detect your screen resolution, viewport size, device pixel ratio and more. Free online tool.

Detecting screen size...

See your screen resolution, viewport dimensions, device pixel ratio, and color depth. Useful for responsive design testing.

Live updates

Values update when you resize your browser.

All metrics

Screen, viewport, DPR, color depth, orientation.