Instantly detect your screen's resolution, viewport size, pixel ratio, and more. All information read directly from your browser — no downloads needed.
Screen Resolution — The total number of physical pixels on your display (e.g., 1920×1080). Higher resolution means more detail.
Device Pixel Ratio (DPR) — How many physical pixels represent one CSS pixel. Retina displays have DPR of 2 or 3.
Viewport Size — The usable area inside your browser window, excluding toolbars and scrollbars.
Color Depth — Bits used per pixel for color. 24-bit = 16.7 million colors (standard). 30-bit = HDR displays.
Know your screen? Calculate your PPI → or open the ruler →