Free Online User Agent Parser
Decode user agent strings to extract OS, browser version, layout engine, and device info.
Decode User Agent Browser Headers
Every web browser sends a User-Agent header string to servers for every page request. This string contains details about your operating system, browser brand, version, and device type, allowing websites to tailor layouts.
Our free online user agent parser translates these cryptic header strings:
- Browser Details: Extract exact brand (Chrome, Safari, Firefox) and version numbers.
- System Details: Detect operating systems (Windows, macOS, Linux, iOS, Android).
- Layout Engines: Detect render engines (Blink, WebKit, Gecko).
Key Benefits & Features
Detect and parse your own browser user agent with one click.
Presents OS, layout engine, and browser version specs in clear tables.
Headers are evaluated locally in JS. No usage tracking occurs.
How to Use the User Agent Parser Step-by-Step
This utility runs entirely inside your browser using client-side JavaScript. We prioritize your security: none of your inputted text is logged or stored.
- 1
Paste the User Agent string into the parser window.
- 2
Click "Parse User Agent" (or click "Use My User Agent" to load current browser settings).
- 3
Review OS, browser, engine, and device specifications.
Practical Examples
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 Chrome/120.0 Safari/537.36
Frequently Asked Questions (FAQ)
What is a user agent string?▼
A user agent is a text string that a browser sends to servers to identify itself, allowing servers to return mobile or desktop page versions.
Why does my User Agent look like Mozilla?▼
For historical compatibility, almost all modern browser user agents begin with "Mozilla/5.0" to prevent servers from blocking them.
Does this detect scraping bots?▼
Yes, typical crawler headers (like Googlebot) are parsed to identify crawlers and scrapers.
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