MARZWhat Is My Screen Resolution
Instantly see your screen resolution, viewport size, and pixel density.
About this tool
See your screen resolution, browser viewport size, device pixel ratio, and color depth — all updating live as you resize your window.
How to use
- Your screen resolution and viewport size are detected and shown immediately.
- Resize your browser window to see the viewport values update live.
FAQ
What is the difference between screen resolution and viewport size?
Screen resolution is the total number of pixels your monitor displays. Viewport size is the area of that screen actually available to the browser window's content, which is smaller once you account for browser chrome, taskbars, and window borders.
What is device pixel ratio?
Device pixel ratio (DPR) is the ratio between physical screen pixels and CSS pixels. A DPR of 2, common on high-density 'Retina' displays, means each CSS pixel is rendered using a 2×2 grid of physical pixels for sharper detail.
Why does my resolution look different from what my monitor is rated for?
Operating systems often apply a display scaling setting (e.g. 125% or 150%) for readability on high-resolution screens, which changes the effective resolution reported to the browser versus your monitor's native panel resolution.