What Is My User Agent
See your browser's exact user agent string, plus a best-effort guess at your browser and OS.
Read directly from your browser (navigator.userAgent), nothing is sent to a server. The browser/OS detection is a simple best-effort guess from the string's format, not a guarantee — some browsers deliberately send a generic user agent for privacy.
Need the opposite? Use What Is My Browser
What is What Is My User Agent?
Your browser sends a "user agent" string with every request, identifying itself (and often your OS) to the website you're visiting. This is useful for debugging a site that behaves differently across browsers, checking what a script or API sees when it reads navigator.userAgent, or just satisfying curiosity. Read directly from your browser; nothing is sent to a server to get this information (your own browser already sends it with every page you visit anyway).
FAQ
Some browsers (Safari, and increasingly others) intentionally send a generic or "frozen" user agent string for privacy, which can make simple pattern-based detection like this tool's guess unreliable. The raw string above the guess is always accurate; the guess is best-effort.
No, this reads navigator.userAgent directly in your browser and displays it, nothing is transmitted anywhere to produce this page.