# 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. ### 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. --- *Source: [ocxly.com/screen-resolution.html](https://ocxly.com/screen-resolution.html) — OCXLY, free 100% client-side privacy-first tools. Free screen resolution checker. Instantly see your screen resolution, physical pixels, device pixel ratio, colour depth, viewport and aspect ratio. Updates live, entirely in your browser.*