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What Is My Screen Resolution

Shows your screen resolution, window size, pixel ratio and colour depth, updating live as you resize.

  1. Open the page
  2. Resize the window to watch the values update

Frequently asked questions

What is the difference between screen resolution and window size?
Screen resolution is the fixed pixel count of your monitor or display. Window size is how large your browser window currently is, which changes as you resize it — this tool shows both, live.
What does pixel ratio mean?
It’s the ratio of physical pixels to CSS pixels on your display — a ratio of 2 means a "Retina"-style high-density screen where each CSS pixel is rendered with 4 physical pixels.
Why do the numbers change when I resize the window?
The window size, available space and sometimes colour depth readings are live — they update immediately as your browser window or display setup changes.
Does this tool send my screen info anywhere?
No. It reads values already available to your browser and displays them locally — nothing is uploaded or logged.
Do I need to install anything or sign up?
No. It runs entirely in your browser — no software install, no account, no email required.
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