Developer Essentials · Free Tool
Screen Resolution Checker
Instantly see your screen resolution, pixel density, colour depth and more. Values update live as you move between displays or zoom. Nothing is uploaded.
Live — updates on resize, zoom or display change
How it works
Your screen resolution is the full size of your display in CSS pixels (screen.width × screen.height). The device pixel ratio tells you how many physical pixels each CSS pixel maps to — 2 or 3 on high-density "Retina" screens — so the true physical resolution is resolution × ratio. All values come straight from your browser and never leave your device.