👤 User Agent Detector
Analyze Browser & Device Information
Complete User Agent String Parser & Analyzer
Browser Detection
Identify browser name, version, and engine
OS Detection
Determine operating system and version
Device Type
Identify mobile, tablet, or desktop
100% Private
All analysis done locally in your browser
📚 Understanding User Agent Strings
What is a User Agent?
A User Agent is a string sent by your browser to every website you visit. It contains information about your browser, operating system, device type, and various capabilities. Websites use this information to optimize content, detect compatibility issues, and sometimes track users.
User Agent String Structure
User Agent strings follow a specific format. A typical structure includes: the application/browser name, version number, operating system, and additional capabilities.
Why Do User Agents Matter?
Website Compatibility: Websites check User Agent strings to determine which version of their site to send.
User Tracking: Advertisers and analytics services use User Agent strings as one component of user tracking.
Bot Detection: Search engines, web scrapers, and automated bots identify themselves through User Agent strings.
Feature Detection: Websites detect browser capabilities through User Agent analysis.
Browser Detection from User Agent
Chrome: Identifiable by "Chrome" in the string.
Firefox: Contains "Firefox" followed by version number. Includes "Gecko" as rendering engine.
Safari: Contains "Safari" but often shared with Chrome.
Edge: Modern Edge contains "Edg" in the string.
Operating System Detection
Windows: Identifiable by "Windows NT" followed by version number.
macOS: Contains "Mac OS X" or "Macintosh".
Linux: Simply contains "Linux" in the string.
iOS: Contains "iPhone", "iPad", or "iPod".
Android: Identifiable by "Android" followed by version number.
Device Type Identification
Mobile Phones: User Agent contains "Mobile" or specific phone identifiers like "iPhone".
Tablets: Contains "iPad" or large-screen Android device identifiers.
Desktop: Lacks "Mobile" or device-specific keywords.
Frequently Asked Questions
Q: Is my User Agent visible to websites? A: Yes, every website you visit receives your User Agent.
Q: Can I hide my User Agent? A: You can change it with extensions, but you'll always send some User Agent to websites.
Q: Why do websites need my User Agent? A: For optimizing content and detecting compatibility issues.