The viewport excludes browser chrome like toolbars and scrollbars.
Is this processed locally?
Yes. We only read standard browser APIs; nothing is sent to a server.
What is Device Pixel Ratio?
DPR tells you how many physical pixels map to one CSS pixel. Retina displays are usually 2× or 3×.
About Screen Info Checker
Your physical screen has a resolution; your browser sees a CSS pixel viewport; the OS reports an available work area minus the taskbar. This page surfaces all three so you can compare what your screen reports to what your code sees.
Screen vs Viewport vs Available
screen.width × screen.height — physical screen resolution in CSS pixels. screen.availWidth × screen.availHeight — usable area minus OS taskbar/dock. window.innerWidth × innerHeight — viewport inside the browser, minus tabs, address bar, scrollbars. window.devicePixelRatio — physical pixels per CSS pixel (1 on standard displays, 2 or 3 on Retina/HiDPI)." }} />
Color Depth and HDR
. Note that high color depth in the browser does not mean the page will render in HDR — that requires explicit CSS color-space declarations and is still poorly supported." }} />
Why Mobile Numbers Look Off
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