Free online screen resolution checker. Real-time display of screen size, resolution, pixel ratio, and viewport dimensions. Perfect for frontend developers and designers. No signup required.
Zero dependencies · Works offlineFree online screen resolution checker. Real-time display of screen size, resolution, pixel ratio, and viewport dimensions. Perfect for frontend developers and designers. No signup required.
DPR is the ratio of physical pixels to CSS pixels. Retina screens typically have DPR=2, some high-end phones reach 3.
Screen resolution is physical pixels (e.g., 1920×1080), viewport is the browser's visible area (minus taskbars, bookmarks), usually smaller.
Frontend developers need screen parameters for responsive design; designers need target user device characteristics; monitor buyers reference it.