User Agent

What Is My User Agent? — Browser Information

The What Is My User Agent tool is a free online utility that instantly displays your browser's user agent string and breaks it down into its component parts. The user agent is a text identifier that your browser sends with every HTTP request, telling websites which browser you are using, its version, your operating system, device type, and rendering engine. Understanding your user agent is essential for debugging web compatibility issues and verifying that websites detect your browser correctly.The tool parses the raw user agent string and presents a structured breakdown showing: browser name and version (Chrome 120, Firefox 121, Safari 17, Edge 120, etc.), operating system (Windows 11, macOS 14, Android 14, iOS 17, Linux), device type (desktop, mobile, tablet), rendering engine (Blink, Gecko, WebKit), and platform architecture (x86_64, ARM). The full raw string is also displayed for copying. The tool compares your user agent against a comprehensive database of known agent patterns to provide accurate identification.Web developers verify how their browser identifies itself when debugging responsive design and feature detection issues. QA testers confirm user agent strings when testing browser-specific behaviors. IT support staff identify a user's browser and OS without asking them to navigate settings menus. Security researchers analyze user agent fingerprinting. SEO professionals verify that search engine crawlers (Googlebot, Bingbot) are correctly identified. The tool processes your user agent entirely client-side from the navigator.userAgent JavaScript property.User Agent Detector is part of the facilita.tools network and developer toolkit. Available in Portuguese, English, and Spanish, optimized for desktop and mobile.