WebTorqTools
Local In-Browser Processing

User-Agent String Parser & Diagnostics

Parse HTTP User-Agent strings locally to inspect browser engine, operating system, layout engine, and client architecture tokens.

Loading tool interface...

How to use User Agent Parser

  1. 1

    Your current browser User-Agent string is automatically populated on load.

  2. 2

    Optionally paste any custom User-Agent string to inspect.

  3. 3

    Click Parse Agent to inspect the detected browser, OS, and platform badges.

Capabilities

  • Extracts browser brand (Chrome, Firefox, Safari, Edge, Opera)
  • Identifies operating system platform (Windows, macOS, Linux, Android, iOS)
  • Detects bot, crawler, and webhook user-agent tokens
  • Completely client-side string analysis without remote telemetry

Client-Side User Agent String Analysis & Diagnostic Tool

Every HTTP request sent by a web browser includes a User-Agent header. This text string informs the destination web server about the browser software, rendering engine, and host operating system. However, due to decades of legacy compatibility workarounds, real-world user agent strings are lengthy, convoluted, and difficult to decipher manually.

WebTorq's User Agent Parser breaks down complex UA strings into structured diagnostic badges, highlighting the exact browser name, OS platform, and architecture tokens in real time without sending data over the network.

What the Parser Analyzes

Browser Family

Identifies modern and legacy browser families including Google Chrome, Mozilla Firefox, Apple Safari, Microsoft Edge, and Opera.

Host Operating System

Extracts operating system indicators for Windows, macOS, Linux, Android, iOS, and ChromeOS.

Bot & Crawler Identification

Detects automated web crawler strings such as Googlebot, Bingbot, and custom webhook agents.

Complementary Web Inspection Utilities

  • Inspect target IP geolocation and ISP details with our IP Lookup.
  • Break down URLs and query parameters using the URL Parser.
  • Test regular expressions for User-Agent matching via the Regex Tester.
Privacy & Processing

This tool operates in a sandbox directly inside your web browser. All parsing, processing, and downloads are rendered locally. Your file size, metadata, and contents never cross the network. It works completely offline.

Frequently Asked Questions

What information does the User Agent Parser extract?

It inspects browser user-agent strings to detect client browser brand (Chrome, Firefox, Safari, Edge, Opera), rendering engine, operating system (Windows, macOS, Linux, iOS, Android), and platform tokens.

Can I test custom user agent strings or only my own browser?

The tool automatically loads your current browser user agent string on startup, but you can paste any custom user-agent string to inspect bot spiders, mobile clients, or legacy browsers.

Why are modern browser user agents so complex and confusing?

Due to historical compatibility reasons, modern browsers include legacy tokens like Mozilla/5.0, AppleWebKit, and KHTML to prevent older web servers from blocking feature-rich browsers.

Is my user agent string transmitted to WebTorq servers?

No. Parsing is performed entirely client-side using JavaScript pattern analysis in your browser.

How does this compare to Client Hints (User-Agent Client Hints)?

Client Hints are modern structured HTTP request headers (Sec-CH-UA) designed to replace frozen user-agent strings. This parser analyzes the traditional User-Agent string still sent by browsers for backward compatibility.

Related Tools

URL Parser & Query Mapper
IP Lookup & Geolocation
UUID Generator