User Agent Checker - Detect Browser, OS & Device Information
Free online User Agent Checker tool that analyzes user agent strings to identify browsers, operating systems, devices, and technical specifications. Perfect for developers, SEO specialists, and website administrators.
📊 Analysis Results
- Chrome Windows: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36
- Safari iOS: Mozilla/5.0 (iPhone; CPU iPhone OS 14_6 like Mac OS X) AppleWebKit/605.1.15
- Google Bot: Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)
- Android Chrome: Mozilla/5.0 (Linux; Android 10) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.120
Accurate Detection
Advanced parsing algorithms with 98% accuracy for browser and OS detection from user agent strings.
Mobile & Desktop
Detect smartphones, tablets, desktops, smart TVs, gaming consoles, and IoT devices.
Bot Detection
Identify search engine crawlers, SEO tools, scrapers, and automated bots in user agents.
Real-time Updates
Regularly updated database with latest browsers, devices, and operating systems.
Why Use Our User Agent Checker?
Debug browser-specific issues and test cross-browser compatibility with accurate UA detection.
Identify search engine bots, monitor crawl behavior, and optimize for different user agents.
Detect suspicious bots, crawlers, and automated tools accessing your website.
Understand your audience's devices and browsers for better targeting and analytics.
Practical Applications
- Browser Compatibility: Test websites across different browsers and versions
- Analytics Enhancement: Enrich your analytics with detailed device information
- Security Monitoring: Detect and block malicious bots and scrapers
- Content Optimization: Serve device-specific content and features
- Quality Assurance: Verify user agent spoofing and test edge cases
- API Development: Handle different user agents in your API responses
📝 About User Agents
What is a User Agent? A user agent is a string that web browsers and other applications send to websites to identify themselves.
Structure: Typically contains browser name, version, operating system, rendering engine, and device information.
Importance: Helps websites deliver optimized content, track analytics, and maintain security against malicious bots.
Privacy Note: User agents can reveal information about your device and software. Modern browsers are moving toward more private user agents.
❓ Frequently Asked Questions
What information can you get from a user agent?
Browser name/version, operating system, device type, rendering engine, language, and whether it's a mobile device or bot.
How accurate is user agent parsing?
Our tool achieves 98% accuracy for major browsers and OS. Some custom or spoofed UAs may be harder to detect.
Can user agents be faked or spoofed?
Yes, user agents can be easily spoofed. They should not be used for security purposes alone.
Do you store the user agents I check?
No. All processing happens locally in your browser. We don't store or track any user agent data.
✅ Supported Platforms
Detects 2000+ browser versions, 50+ operating systems, and 1000+ device models