User-Agent Parser

The User Agent Parser Tool is a comprehensive online utility designed to decode and analyze User-Agent strings found in HTTP headers. It combines real-time detection with deep analysis capabilities.

What is a User Agent?

When you visit a website, your browser sends a specific string of text to the server known as the User Agent (UA). Think of it as your "digital ID card" on the internet.

• The Mozilla Mystery: You might notice that almost all UA strings (even for Chrome, Safari, or Edge) start with Mozilla/5.0. This is a historical quirk from the early "browser wars." Modern browsers maintain this prefix to ensure compatibility with older websites that check for "Mozilla" to allow access.
• Structure: A typical UA string contains encoded information about the Application Name/Version, Operating System, Rendering Engine, and Device Details. For example, specific tokens identify whether you are running on Windows 10 or macOS, and whether you are using a mobile device or a desktop.

Key Features

This tool translates these cryptic strings into human-readable data:

• Instant Local Detection: upon loading, the tool automatically displays your current device's raw User-Agent string, allowing you to verify your own digital fingerprint instantly.
• Custom Analysis: A dedicated input area allows you to paste UA strings from server logs, web scrapers, or emulators for immediate diagnosis.
• Comprehensive Metrics:
  • Browser: Identifies major browsers (Chrome, Firefox, Safari) and their exact versions.
  • Operating System: Distinguishes between platforms like Windows, macOS, Android, iOS, and Linux.
  • Engine: Reveals the underlying rendering engine (WebKit, Gecko, Blink) crucial for web compatibility debugging.
  • Device Info: Categorizes the device type (Desktop, Mobile, Tablet) and attempts to resolve specific vendor models (e.g., iPhone, Pixel, Samsung).
  • CPU Architecture: Detects processor architecture (e.g., amd64, arm64) to help understand the hardware environment.

Whether you are a developer debugging responsive designs, an SEO specialist analyzing bot traffic, or a security researcher identifying spoofed identities, this tool provides precise and fast User Agent identification.

Common User Agent Examples

1. PC Browsers

2. Mobile Devices

3. Crawlers/Special Clients