What's My Browser? (User Agent, Screen & Viewport)
See your browser, version, operating system, user agent, screen resolution, viewport size, pixel ratio, language, time zone and supported features — handy for bug reports.
How to use
- 1Open the page — everything is detected instantly.
- 2Press Copy report to paste the details into a support ticket or bug report.
Frequently asked questions
What is a user agent?
A text string your browser sends to websites describing the browser, version and operating system.
Why is the viewport smaller than my screen?
The viewport is the visible page area — it excludes toolbars, tabs and scrollbars, and changes as you resize the window.
What is device pixel ratio?
How many physical pixels make up one CSS pixel. Retina and most phone screens have a ratio of 2 or 3.