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

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

Analyze Custom User Agent

Clear or replace existing content in input box
Paste User Agent string to analyze
Parsing results update in real-time during input
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.