What is my screen resolution?
See your screen resolution in pixels instantly, plus your available screen area. Detected live in your browser, nothing uploaded.
Your screen resolution is shown above in pixels, width by height. This is the full size of your display as your browser sees it, for example 1920 by 1080 or 2560 by 1440. It is the total canvas of your monitor or device screen, not the size of the browser window.
There is a subtlety worth knowing: on high-density (Retina) displays, the resolution your browser reports is often the logical resolution, not the raw physical pixel count. A screen with twice the physical pixels reports the same logical size but at a device pixel ratio of 2, so the extra pixels sharpen the image rather than fitting more content.
This differs from your viewport size, which is only the visible area inside the browser window after toolbars and, on desktop, any space you have not maximised. If you are sizing a layout, the viewport is usually what matters; the screen resolution tells you the hardware you are working with.
What you should know
Why sites collect it
Sites read your screen resolution to serve appropriately sized images, choose responsive layouts, decide whether a design fits, and gather analytics on the displays their audience uses so they can design for the common cases.
Privacy implications
Screen resolution is a meaningful fingerprinting signal because there are many possible values and yours tends to stay constant. Combined with your device pixel ratio, colour depth and browser it materially narrows down your device. Unusual resolutions stand out more than common ones.
How to change or hide it
You can change your resolution in your operating system display settings, though that affects everything you see, not just what sites read. Privacy browsers may report a rounded or common resolution to reduce distinctiveness. There is no per-site control.
Frequently asked questions
Why does my resolution look smaller than my monitor's specs?
On high-density displays the browser reports a logical resolution and applies a device pixel ratio, so a sharp 4K panel may report a smaller number with a ratio of 2.
What is the difference between screen resolution and viewport?
Screen resolution is your whole display; the viewport is only the visible content area inside the browser window. Layouts usually respond to the viewport.