What's My User Agent
Display your browser user agent string
User Agent Detector
Display your browser user agent string and details
Full User Agent String
Screen Resolution
Color Depth
About User Agent Strings
A user agent string is a text string that your browser sends to websites to identify itself. It contains information about your browser type, version, operating system, and device. This information helps websites optimize their content for your specific browser and device.
Privacy & Security
All user agent parsing happens entirely in your browser using JavaScript pattern matching. No user agent strings are transmitted to any server, stored in databases, or logged. Your browsing information remains completely private and secure.
About This User Agent Detector
Decode any user agent string with our comprehensive user agent detector and parser. This tool analyzes user agent data to reveal detailed information about browsers, operating systems, device types, rendering engines, and version numbers. Essential for web developers debugging compatibility issues, analytics professionals tracking user demographics, and security experts analyzing traffic patterns. Get instant, detailed breakdowns of user agent strings from any device or browser.
Key Features
Automatic Detection
Instantly detects and displays your current browser's user agent
Custom String Parsing
Paste any user agent string for detailed analysis and breakdown
Browser Identification
Identifies browser name, version, and rendering engine
Operating System Detection
Detects OS name, version, and architecture (32-bit/64-bit)
Device Type Recognition
Identifies desktop, mobile, tablet, or bot/crawler devices
Mobile Device Details
Shows manufacturer, model, and specific mobile device information
Bot Detection
Identifies search engine crawlers and automated bots
Rendering Engine Info
Shows underlying engine (Blink, WebKit, Gecko) and version
Historical Comparison
Compare multiple user agent strings side-by-side
Export Capabilities
Copy parsed data for documentation or analytics reports
How to Use the User Agent Detector
View Your User Agent
Open the tool to instantly see your current browser's user agent and parsed details
Analyze Custom Strings
Paste any user agent string into the input field for detailed parsing
Review Parsed Information
Examine browser, OS, device type, and version details in organized sections
Copy or Export Results
Use the copy button to save parsed data for testing or documentation
Frequently Asked Questions
What is a user agent string?
A user agent string is a text identifier that browsers send to web servers with every request. It contains information about the browser, operating system, device type, and rendering engine. This helps websites deliver appropriate content and track visitor statistics.
Can user agent strings be spoofed or faked?
Yes, user agents can be easily modified by browser extensions or developer tools. While useful for testing, this means user agent data alone shouldn't be relied upon for critical security decisions. Use it for analytics and optimization, not authentication.
Why do user agent strings look so complex?
User agent strings evolved over decades, accumulating legacy identifiers for backward compatibility. Modern browsers include historical tokens (like 'Mozilla/5.0') to ensure old websites still work correctly. This makes them lengthy but information-rich.
How accurate is user agent detection?
Very accurate for standard browsers. Our parser uses comprehensive databases and pattern matching to identify thousands of browser/device combinations. However, heavily modified or spoofed user agents may not parse perfectly.
What's the difference between browser name and rendering engine?
Browser name (Chrome, Firefox, Safari) is what users see, while the rendering engine (Blink, Gecko, WebKit) is the underlying technology that displays web pages. Different browsers can share engines—for example, Chrome, Edge, and Opera all use Blink.
Can I test mobile user agents on desktop?
Absolutely! Paste any mobile user agent string into our tool to analyze it. This is perfect for testing mobile-specific features or understanding mobile traffic from your analytics logs.
How do I identify search engine bots?
Our tool automatically detects common search engine crawlers (Googlebot, Bingbot, etc.) and displays them under device type. Bot user agents typically include identifiers like 'bot', 'crawler', or 'spider' along with the search engine name.
Is my user agent information private?
User agents are public information sent with every web request—websites can already see yours. Our tool processes everything locally in your browser. No user agent data is stored, logged, or transmitted to our servers.
Common Use Cases
- Browser Compatibility Testing: Identify specific browser versions to debug compatibility issues
- Web Analytics Analysis: Parse user agent data from analytics logs to understand visitor demographics
- Mobile Traffic Optimization: Detect mobile devices and optimize content delivery accordingly
- Bot and Crawler Identification: Distinguish legitimate search engine bots from malicious crawlers
- Feature Detection Validation: Verify browser capabilities before implementing advanced features
- Security Threat Analysis: Analyze suspicious user agents for security monitoring and fraud prevention
- Legacy Browser Detection: Identify outdated browsers requiring special handling or warnings
- Device-Specific Development: Test and optimize experiences for specific devices and platforms
Why Use Our User Agent Detector?
Our user agent detector provides the most comprehensive parsing and analysis available for free. Whether you're debugging browser-specific bugs, analyzing web traffic patterns, or optimizing for mobile devices, you get instant, detailed insights from any user agent string. The tool handles modern browsers, legacy systems, mobile devices, and bots with equal accuracy. Completely free, no registration required, and all processing happens securely in your browser. Perfect for developers, analysts, and IT professionals who need reliable user agent intelligence.