Instantly check your browser's user agent string. Identify your browser, operating system, and device details for debugging, compatibility testing, or development purposes.
Most people never think about their user agent until a website behaves strangely, a service misidentifies their device, or a developer asks for browser details during troubleshooting. We added this What Is My User Agent tool because browser and device information can quietly affect how websites load, display, and function. In many cases, knowing exactly what your browser is reporting can help explain compatibility issues, login problems, mobile redirects, or why one site behaves differently from another.
Your browser user agent string acts like a digital identifier, telling websites information about your browser, operating system, and device environment. Developers often use this data for debugging, responsive design testing, analytics, or compatibility support, while everyday users may simply want to confirm what information their browser is sharing. Whether you are checking if a site sees you as mobile or desktop, verifying browser version details, or troubleshooting technical support issues, quick access to this information can save time.
This tool is designed to make that process simple by instantly showing your user agent string in a readable format without requiring technical digging through browser settings. For developers, QA testers, and privacy-conscious users, it can also be useful for identifying spoofed environments, browser extensions that alter headers, or testing how certain systems detect your setup.
Important Practical Note: A user agent can help identify browser and device details, but it is not always perfectly reliable. Some browsers, privacy tools, bots, or extensions can modify or mask this information. That means user agent data is best used as a helpful diagnostic clue—not absolute proof of a device’s full identity.
A user agent is a string sent by your browser to the web server you are connecting to. It contains details about your browser type, operating system, and sometimes device model. Websites use this information to optimize content delivery and ensure compatibility.
Checking your user agent helps developers debug browser-specific issues, test website compatibility, and identify how websites perceive their visitors/’ devices and operating systems.
Yes, most modern browsers allow you to change your user agent using developer tools or extensions. Changing the user agent can help test how a website behaves on different browsers and devices.