User Agent Parser

A User Agent (UA) string is a text identifier that web browsers and applications send to websites to identify themselves. It typically contains information about the browser name, version, operating system, device type, and rendering engine. Websites use this information to serve optimized content for different devices and browsers.

Websites parse User Agent strings for analytics, device detection, feature targeting, and content optimization. By analyzing the UA string, developers can serve mobile-optimized pages to phones, detect outdated browsers, identify bots for SEO analysis, and provide the best user experience for each visitor.

You can find your User Agent by using our tool above - it automatically detects and displays your current browser's UA string. Alternatively, you can type "what is my user agent" in Google, check your browser's developer tools (Network tab), or visit about: pages in some browsers.

A User Agent string typically reveals: browser name and version (Chrome, Firefox, Safari, Edge), operating system and version (Windows, macOS, Linux, Android, iOS), device type (desktop, mobile, tablet), rendering engine (Blink, Gecko, WebKit), and whether the client is a bot or crawler.

Yes, User Agent strings can be easily modified using browser extensions, developer tools, or programmatically in HTTP requests. This is why websites shouldn't rely solely on UA strings for security. Common uses for UA spoofing include testing mobile layouts on desktop, bypassing browser restrictions, and web scraping.