User Agent Parser

Introduction

User Agent parser is used to analyze and decode browser User Agent strings, extracting detailed information like browser type, version, operating system, CPU architecture, and rendering engine. Supports automatic detection of current browser or parsing any custom User Agent, suitable for web development debugging, compatibility testing, and traffic analysis scenarios.

Core Features

• Automatic Detection: Automatically captures and parses current browser's User Agent upon page load
• Custom Input: Paste any User Agent string for analysis
• Comprehensive Parsing: Extract five key component information
  • Browser name and version
  • CPU architecture (x86, x64, ARM, etc.)
  • Rendering engine and version
  • Operating system and version
  • Device type, vendor, and model

What is User Agent

User Agent string is an identifier browsers send to servers with each HTTP request, containing browser type, version, operating system, device, and other information. Websites use this information to:

• Provide content optimized for different devices
• Detect browser compatibility and load corresponding Polyfills
• Track visitor browser and operating system distribution statistics
• Identify crawlers and automation tools

How to Use

View Current Browser User Agent

1. Open tool page
2. Tool automatically displays current browser's User Agent string
3. Parsing results display instantly in information cards below

Analyze Custom User Agent

1. Clear or replace existing content in input box
2. Paste User Agent string to analyze
3. Parsing results update in real-time during input
4. View detailed parsing data in information cards

Parsing Result Explanation

Browser

Shows browser name and version number, common browsers include:

• Chrome, Edge, Firefox, Safari
• Opera, Brave, Vivaldi
• Mobile browsers (like Chrome Mobile, Safari Mobile)
• Crawlers (like Googlebot, Bingbot)

CPU Architecture

Shows processor architecture type, such as:

• amd64: 64-bit x86 architecture (Intel/AMD)
• x86: 32-bit x86 architecture
• ARM: ARM architecture (common in mobile devices and Apple Silicon)
• Some devices or browsers may not provide this information

Rendering Engine

Shows browser's rendering engine and version:

• Blink: Chrome, Edge, Opera, etc.
• Gecko: Firefox
• WebKit: Safari
• Trident: Old IE browsers

Operating System

Shows operating system name and version:

• Windows: Windows 10, Windows 11, etc.
• macOS: Big Sur, Monterey, Ventura, etc.
• Linux: Various distributions
• Android: Android 11, 12, 13, etc.
• iOS: iOS 15, 16, 17, etc.

Device

Shows device information, including type, vendor, and model:

• Type: Desktop, Mobile, Tablet
• Vendor: Apple, Samsung, Huawei, Xiaomi, etc.
• Model: iPhone 14 Pro, Galaxy S23, iPad Pro, etc.
• Desktop browsers usually don't display device information

Use Cases

Web Development and Debugging

Test responsive design performance on different browsers and devices. Verify browser detection logic correctness. Debug compatibility issues specific to browsers or operating systems. Confirm device type recognition accuracy when developing adaptive layouts.

Data Analysis

Analyze website traffic logs to understand visitor browser and device distribution. Identify requests from crawlers, filter invalid traffic. Track user percentages across different operating systems to guide adaptation priorities. Detect abnormal User Agents, identify malicious crawlers or click fraud.

Security Analysis

Check User Agent in requests for suspicious patterns. Identify automation tools disguised as browsers. Analyze User Agent characteristics of DDoS attacks or crawlers. Verify anti-crawler strategy effectiveness.

Notes

• Parsing follows UAParser standard specifications
• All parsing completes on client side, User Agent strings are not sent to server
• Supports recognition of 1000+ browser, operating system, and device types
• Recognition rules are regularly updated to support newer browsers and devices

Privacy Protection

All User Agent parsing completes locally in the browser, no data sent to server, ensuring your privacy and security.