See your browser and version, operating system, screen resolution, viewport size, pixel ratio, user agent and other device details.
Your browser
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Test what keys your keyboard sends with the keycode finder.
It's shown at the top of this page. The browser and operating system are read from your browser's user-agent information, which every browser sends to websites.
Screen size is the whole display. Viewport size is the part of the browser window that shows the web page, so it's smaller because of toolbars, tabs and the dock. Websites lay out their content to the viewport.
The number of physical screen pixels per CSS pixel. A ratio of 2 or 3 means a high-resolution (Retina) display, so images need to be 2× or 3× larger to look sharp.
No. Everything is read and displayed in your browser. Use “Copy report” to share it with support, for example when reporting a website problem.