How to use Screen Resolution and Browser Info
- Open the page.
- Read your screen and browser details.
- Resize the window and reload to see the viewport change.
About this tool
The values come from standard browser interfaces: screen size, the size of the visible window (viewport), the device pixel ratio that tells you how sharp high-density screens are, language, time zone and the user agent string.
It is useful for responsive design testing and for giving accurate details to support teams. Everything is read locally and nothing is sent.
Frequently Asked Questions
- What is device pixel ratio?
- How many physical pixels are used for one CSS pixel. Retina and most phone screens have a ratio of 2 or 3.
- Why is my window smaller than my screen?
- The window excludes toolbars, scrollbars and the operating system's taskbar.
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