User-Agent Parser
Parse and analyze user agent strings
User-Agent Parser
User Agent String
Common User-Agents
Tips:
- • User-agent strings help identify browsers, operating systems, and devices
- • Click "Use Current Browser" to analyze your own user-agent
- • Try the common user-agents to see how different browsers identify themselves
- • Useful for web analytics, feature detection, and responsive design testing
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Try Now README PreviewWhat is User-Agent Parser?
A User-Agent Parser is a specialized tool that decodes and analyzes user agent strings to extract detailed information about browsers, devices, and operating systems. User agent strings are identifiers sent by web browsers, mobile apps, and other software when making HTTP requests, containing encoded information about the client's environment. Our parser breaks down these complex strings into readable components including browser name and version, operating system details, device type (mobile, tablet, desktop), rendering engine, and more. This tool is essential for web developers, analysts, and marketers who need to understand their audience's technology landscape. The parser handles thousands of different user agent patterns from modern browsers, legacy systems, mobile devices, bots, and specialized applications. Whether you're debugging browser-specific issues, analyzing website traffic, or optimizing content delivery, this parser provides the insights needed to make informed technical and business decisions.
When to Use User-Agent Parser
Use our User-Agent Parser whenever you need to understand the technical characteristics of your website visitors or debug browser-specific issues. This tool is essential when analyzing web server logs, investigating user experience problems on specific devices, or making decisions about browser support and feature compatibility. Web developers commonly use it when troubleshooting CSS or JavaScript issues that only affect certain browsers, implementing responsive design breakpoints, or deciding which web standards to adopt. Marketing and analytics teams rely on it for audience analysis, understanding device preferences, and optimizing campaigns for specific platforms. It's particularly valuable when launching new features, investigating user behavior anomalies, or preparing technical specifications for cross-platform compatibility. The tool is also useful for security analysis, bot detection, and understanding the diversity of clients accessing your web services.
How to Use User-Agent Parser
7 stepsPaste the user agent string into the input field or use the 'Detect My User Agent' button
Click parse to analyze the user agent string components
Review the extracted browser information including name, version, and engine
Check the detected operating system and version details
Examine the device type classification (mobile, tablet, desktop, or bot)
Use the detailed breakdown to understand the client environment
Copy specific information or save the complete analysis for your records
Privacy & Security
100% SecureYour user agent strings are processed entirely within your web browser using client-side JavaScript technology. No user agent data, browser information, or analysis results are transmitted to our servers or stored anywhere outside your device. This ensures complete privacy and security for sensitive visitor data, analytics information, and user behavior patterns. The tool works offline once loaded, providing an additional layer of security for confidential user agent analysis.
Pro Tips
7 tipsUse the 'Detect My User Agent' feature to see how your own browser identifies itself to websites
Compare user agent strings from different browsers and devices to understand the variation in your audience
Keep in mind that user agents can be spoofed, so use this data alongside other analytics for critical decisions
Save parsed results for common user agents in your analytics to build a reference database
Use user agent analysis to prioritize browser testing and compatibility efforts
Consider that mobile user agents often contain more detailed device information than desktop browsers
Regular user agent analysis helps track the adoption of new browser versions and emerging devices
Frequently Asked Questions
5 Q&AQ1:What is a user agent string and why is it important?
A user agent string is a text identifier sent by web browsers and applications to identify themselves to web servers. It contains information about the browser, version, operating system, and device. This data is crucial for web analytics, responsive design decisions, and providing optimized experiences for different platforms.
Q2:How accurate is user agent parsing for device detection?
User agent parsing is generally reliable for major browsers and devices, but it's not 100% accurate. Some browsers may spoof user agents, and new devices may not be immediately recognized. It's best used in combination with other detection methods for critical applications.
Q3:Can user agent strings be faked or spoofed?
Yes, user agent strings can be easily modified or spoofed by users, browsers, or applications. While most legitimate traffic has accurate user agents, some users change them for privacy reasons, and malicious bots often use fake user agents to avoid detection.
Q4:What's the difference between browser engine and browser name?
The browser engine (like WebKit, Blink, Gecko) is the underlying technology that renders web pages, while the browser name (like Chrome, Firefox, Safari) is the application users interact with. Multiple browsers can use the same engine but have different features and interfaces.
Q5:How can I use user agent data to improve my website?
User agent data helps you understand your audience's technology preferences, optimize for popular browsers and devices, identify compatibility issues, and make informed decisions about feature support and responsive design breakpoints.
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