Viewport Checker

What is my viewport? Your screen size, live — free, no signup.

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Your viewport size

Viewport—

Screen—

Available screen—

Physical pixels—

DPR—

Orientation—

Color depth—

Numbers update live when you rotate or resize your screen.

🔒 Private by design: this tool runs 100% in your browser. Your screen numbers are never sent to or saved on ToolSewa.

What is a viewport?

The viewport is the area a website actually sees — your browser window's width and height in CSS pixels. The screen size is your whole display, which is usually a little bigger because browser bars and system menus take space.

DPR (device pixel ratio) tells how many physical pixels make one CSS pixel. A phone with a 360 × 800 viewport and DPR 2 has a 720 × 1600 physical screen — which is why small phones still look sharp.

Use this page with the Mobile View Checker to see how any website looks at your exact size.