What is My User Agent?

Detect and analyze your browser's user agent string

Your User Agent String
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Browser
Version
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Operating System
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Device Type
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Rendering Engine
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What is a User Agent?

A User Agent is a string that your web browser sends to every website you visit. It contains information about your browser, operating system, and device. This helps websites optimize their content for your specific setup.

Why is it useful?
  • Website developers use it to ensure compatibility
  • Web servers can deliver optimized content based on your device
  • Analytics tools track browser and device usage
  • Security systems can identify suspicious activities
Privacy Note

Your user agent string is visible to all websites you visit. While it doesn't directly identify you, it can be used as part of browser fingerprinting. Consider using privacy-focused browsers or extensions if this concerns you.

About This Tool

This free user agent detector instantly analyzes and displays comprehensive information about your browser, device, and system configuration. Whether you're a developer testing cross-browser compatibility, a security professional analyzing browser fingerprints, or simply curious about what information your browser reveals, this tool provides detailed insights in a user-friendly format.

Key Features
  • Instant Detection: Automatically detects your user agent string as soon as you visit the page
  • Comprehensive Parsing: Breaks down the user agent into readable components including browser name and version, operating system, device type, and rendering engine
  • Detailed Information: View additional details like screen resolution, viewport size, color depth, pixel ratio, platform, language preferences, cookie settings, and timezone
  • One-Click Copy: Quickly copy your user agent string to clipboard for use in testing or configuration
  • Dark Mode: Toggle between light and dark themes for comfortable viewing in any environment
  • Privacy-Focused: All analysis happens in your browser - no data is sent to any server
  • Responsive Design: Works perfectly on desktop, tablet, and mobile devices
Understanding the Information Displayed

User Agent String: The complete raw string your browser sends to websites. This is the primary identifier used by web servers.

Browser: The web browser you're using (Chrome, Firefox, Safari, Edge, etc.) along with its version number. This helps websites ensure compatibility with your browser's features.

Operating System: Your OS (Windows, macOS, Linux, Android, iOS) and version. Websites use this to optimize layouts and features for your platform.

Device Type: Whether you're on a desktop, tablet, or mobile device. This determines which version of a website you'll see - desktop or mobile.

Rendering Engine: The core technology that displays web pages (WebKit, Gecko, Blink, Trident). Different engines may render the same website slightly differently.

Screen Information: Your screen's resolution, color depth, and pixel ratio. This helps websites optimize images and layouts for your display capabilities.

Viewport: The actual visible area of your browser window. This changes when you resize your browser and is crucial for responsive web design.

Platform Information: Technical details about your system including platform type, language preferences, and cookie settings.

Privacy & Locale: Information about your Do Not Track setting and timezone, which websites may use for localization and respecting privacy preferences.