What is a user agent string?

A user agent string is a text identifier that browsers and HTTP clients send with every request. It contains information about the browser, operating system, device type, and rendering engine.

How accurate is the parsing?

The parser uses regex patterns to detect common browsers, operating systems, and devices. It handles the vast majority of modern user agent strings accurately.

Can I parse a custom user agent string?

Yes. Your current browser's user agent is detected automatically, but you can also paste any custom UA string into the input field to parse it.

All parsing happens locally in your browser. No data is sent to any server.

User Agent Parser

Detect and analyze browser user agent strings. Your current UA is parsed automatically.

User Agent String

How to Use User Agent Parser

Step 1

Your browser's user agent is detected automatically on load.

Step 2

Optionally paste a custom UA string into the input field.

Step 3

View parsed results: browser, OS, device type, and engine.

Step 4

Use the information for debugging or analytics.

Features

Auto-detects your current browser's user agent.

Custom UA string input for manual parsing.

Detects browser name and version.

Identifies operating system and version.

Identifies device type and rendering engine.

No external dependencies — pure regex parsing.

FAQ

: A user agent string is a text identifier that browsers and HTTP clients send with every request. It contains information about the browser, operating system, device type, and rendering engine.
: The parser uses regex patterns to detect common browsers, operating systems, and devices. It handles the vast majority of modern user agent strings accurately.
: Yes. Your current browser's user agent is detected automatically, but you can also paste any custom UA string into the input field to parse it.
: All parsing happens locally in your browser. No data is sent to any server.