User-Agent Parser

User-Agent Parser - Analyze and Detect Browser Information

A powerful User-Agent parser tool that analyzes User-Agent strings to extract detailed information about browsers, operating systems, devices, and platforms. Detect browser type and version, OS details, mobile vs desktop, and more. Perfect for web developers, QA testers, and anyone working with browser detection.

What is a User-Agent string?

A User-Agent (UA) string is a text identifier that browsers and other clients send to web servers with every HTTP request. It contains information about:

- Browser name and version (Chrome 120, Firefox 121, Safari 17)
- Operating system and version (Windows 11, macOS 14, Android 13)
- Device type (desktop, mobile, tablet)
- Rendering engine (Blink, Gecko, WebKit)
- Platform architecture (x64, ARM)

Servers use this information to deliver appropriate content, detect capabilities, and provide optimized experiences for different browsers and devices.

How do I use this User-Agent Parser?

Using the parser is simple:

1. Click 'Use My User-Agent' to auto-fill your current browser's User-Agent
2. Or paste any User-Agent string into the input field
3. Click 'Parse' to analyze the string
4. View detailed information about browser, OS, device, and platform

The tool automatically detects and extracts all relevant information from the User-Agent string.

What information can be detected?

The parser extracts:

- Browser: Chrome, Firefox, Safari, Edge, Opera, Internet Explorer, and more
- Browser Version: Major and minor version numbers
- Operating System: Windows, macOS, Linux, Android, iOS, ChromeOS
- OS Version: Specific version numbers when available
- Device Type: Desktop, Mobile, Tablet, or Bot/Crawler
- Platform: Architecture and platform details
- Rendering Engine: Blink, Gecko, WebKit, Trident

All information is parsed from the User-Agent string format.

Why do websites need User-Agent information?

Websites use User-Agent data for:

- Content Optimization: Serve mobile or desktop versions
- Compatibility: Apply browser-specific fixes or features
- Analytics: Track browser and OS usage statistics
- Security: Detect and block malicious bots
- Testing: Verify cross-browser compatibility
- Progressive Enhancement: Enable features based on capabilities
- A/B Testing: Test different versions for different browsers

However, User-Agent sniffing should be used carefully as it can be unreliable. Feature detection is often preferred for determining browser capabilities.

Can User-Agent strings be spoofed?

Yes, User-Agent strings can be easily modified or spoofed:

- Browser extensions can change the User-Agent
- Developer tools allow custom User-Agent strings
- Automated tools and bots often fake User-Agents
- Privacy-focused browsers may use generic User-Agents

Because of this:
- Never rely solely on User-Agent for security
- Don't use it for critical decision-making
- Consider it as a hint, not definitive proof
- Use feature detection when possible
- Combine with other detection methods for important checks

User-Agent is best used for analytics, content optimization, and general device detection, not for authentication or security.

Is my data safe?

Yes, your data is completely safe:

- All parsing happens in your browser
- No data is sent to any server
- We don't store or log any User-Agent strings
- Works completely offline after page load
- No tracking or analytics on the data you parse
- Open-source client-side processing

You can verify privacy by checking your browser's network tab - no requests are made when parsing User-Agents.

Key Features

• Parse any User-Agent string
• Auto-detect your current browser's User-Agent
• Extract browser name and version
• Detect operating system and version
• Identify device type (desktop, mobile, tablet, bot)
• Show rendering engine information
• Display platform architecture
• Copy User-Agent string to clipboard
• Support for all major browsers and platforms
• Dark mode support
• 100% client-side processing - data never leaves your browser
• Works offline after initial load
• No registration required
• Mobile-friendly responsive design