See what your browser reveals
Every site you visit can read a surprising amount about your setup: screen size, operating system, browser, language, and more. This page shows you the same details, which is useful for debugging a display issue, confirming your viewport size while building a responsive layout, or simply understanding what information your browser hands out by default.
How to use it
- Open the page — your details are detected automatically.
- Read your screen and window size, OS, browser, and language.
- Use the numbers when reporting a bug or testing a layout.
What it shows
- Screen resolution and the current window (viewport) size.
- Operating system and browser, parsed from the user-agent.
- Preferred language and a few other browser capabilities.
Questions people ask
Are you collecting this? No — the details are read and displayed in your browser only; nothing is sent or stored.
Why does the window size differ from my screen size? Screen size is your whole display; the window (viewport) is the part the page can actually use, minus toolbars and docks.