Why do browsers spoof other browsers in their User-Agent strings?

Historically, websites would serve different content based on the user agent. New browsers would include tokens from established browsers to ensure they received the full-featured version of sites. This practice, called spoofing or gravitating, is why Chrome's user agent contains 'Safari' and why Edge contains 'Chrome'.

How accurate is the browser detection?

The parser uses a pattern-matching approach that accounts for common spoofing patterns. It correctly identifies Chrome, Firefox, Safari, Edge, and other major browsers even when the user agent string claims to be a different browser. Rare or very new browsers may not be detected as precisely.

What is a User-Agent string?

A User-Agent string is an HTTP header that browsers send with every request to identify themselves. It contains information about the browser name, version, operating system, and rendering engine. Servers use it to serve browser-specific content or track traffic composition.

Can I parse my own browser's user agent?

Yes. The tool auto-detects your current browser's user agent and displays it as the default input. You can also clear it and paste any user agent string from server logs or other sources.

Is User-Agent-based detection reliable?

User-Agent strings can be spoofed or modified by browser extensions, privacy tools, or bots. They're useful for analytics and basic device detection, but for security decisions, you should not rely on User-Agent alone. Use feature detection instead when possible.

Loading tool...

User Agent Parser

A user agent parser decodes a User-Agent string into structured fields: browser name and version, operating system, device type, and rendering engine. It accounts for browser spoofing patterns to identify the actual browser, not the spoofed identity.

100% FreeNo Signup RequiredBrowser-BasedPrivate & Secure

What is User Agent Parser?

A user agent parser is an online utility that decodes HTTP User-Agent strings into structured browser, operating system, and device information, with spoofing-aware detection that identifies the actual browser identity.

Complementary Tools

These tools work great alongside User Agent Parser:

URL Parser Meta Tag Generator

Start Using User Agent Parser Today

User-Agent strings are a mess of spoofed identities and historical cruft. The user agent parser cuts through the noise and tells you exactly which browser, OS, and device made the request. Whether you're debugging server logs, analyzing traffic patterns, or verifying device detection logic, this tool gives you the decoded answer in milliseconds.

Use User Agent Parser Free

Table of Contents