What Is My User Agent

About This Tool

This tool displays your browser user agent string and detailed browser, OS, and device information. The user agent is a text string that browsers send to websites to identify themselves. Developers, support teams, and SEO professionals use this data to debug compatibility issues, test responsive designs, and verify browser capabilities.

Features

• Display full user agent string with one-click copy
• Parse browser name, version, and rendering engine
• Detect operating system and version
• Identify device type: Desktop, Mobile, or Tablet
• Show screen resolution, viewport, color depth, and pixel ratio
• Reveal language, timezone, and technical capabilities
• 100% client-side — no data is sent to any server
• Free to use with no registration required

Frequently Asked Questions

What is a user agent?

A user agent is a text string that your browser sends to websites with every request. It typically includes the browser name, version, operating system, and device type. Websites use this information to serve compatible content, such as mobile-optimized pages.

Why does my user agent matter?

Developers use user agents to test how websites behave on different browsers and devices. Support teams use them to diagnose browser-specific issues. Some websites also use user agent detection to serve different layouts or features.

Can I change my user agent?

Yes. Most browsers allow you to change your user agent through developer tools or extensions. This is commonly used for testing mobile layouts on a desktop browser or bypassing browser-specific restrictions on some websites.

Is my information safe?

Yes. This tool runs entirely in your browser. All information comes from built-in browser APIs. No data is transmitted to any server, stored, or logged.