What is a user agent string?

A user agent string is a text identifier that web browsers and other applications send to web servers. It contains information about the browser name and version, operating system, device type, and rendering engine. Web servers use this information to deliver content optimized for specific browsers and devices.

How does the user agent parser work?

The user agent parser uses the UAParser.js library to decode user agent strings. It analyzes the string pattern and extracts key information including browser name and version, operating system and version, device type and vendor, CPU architecture, and rendering engine details. The tool processes this information instantly and presents it in an easy-to-read format.

Is this user agent parser free to use?

Yes! This user agent parser is completely free to use with no registration, subscriptions, or hidden fees. Parse unlimited user agent strings, compare different agents, access your history, and use all features without any cost. Your data is processed locally in your browser for privacy and speed.

Can I compare multiple user agents?

Absolutely! The tool includes a powerful comparison feature. Click 'Add to Compare' after parsing a user agent to add it to your comparison list. You can add multiple user agents and view them side-by-side to easily spot differences in browsers, operating systems, devices, and engines. This is perfect for testing cross-platform compatibility.

Does the parser save my user agent history?

Yes, the parser automatically saves your parsing history using local storage in your browser. This means your history is stored privately on your device and persists between sessions. You can access, review, and re-parse any previously analyzed user agent strings from the History section. You can also clear your history at any time.

Free Online User Agent Parser (No Signup)

What is a User Agent Parser?

A user agent string is a text identifier that browsers and applications send to web servers. This free tool helps you decode and analyze user agent strings to understand:

Browser Information: Name, version, and rendering engine
Operating System: Platform and version details
Device Information: Type, vendor, and model
CPU Architecture: Processor information when available
Bot Detection: Identify crawlers, scrapers, and non-browser clients

How to use: Your current user agent is automatically detected. Paste any user agent string in the field below to analyze it, or try our sample user agents. You get a plain-English breakdown of every token, one-click copy for any field, bot detection, side-by-side comparison, history, dark mode, and charts!

The parser library could not be loaded from the network, so a built-in fallback parser is being used. Results are still accurate for common browsers.

User Agent Parser

What is a User Agent Parser?

📱 Browser Information

💻 Operating System

📲 Device Information

⚙️ Engine & CPU

🧩 User Agent Breakdown

📄 Raw User Agent String

📊 Your Parsing Statistics

User Agent Parser

What is a User Agent Parser?

📱 Browser Information

💻 Operating System

📲 Device Information

⚙️ Engine & CPU

🧩 User Agent Breakdown

📄 Raw User Agent String

📊 Your Parsing Statistics

Sample User Agents

Parsing History

Compare User Agents