User-Agent Generator

About User-Agent Generator

This free User-Agent generator helps developers and testers quickly generate User-Agent strings for various browsers and devices. It includes a comprehensive database of real UA samples covering Chrome, Firefox, Safari, Edge, Opera, mobile devices, and search engine bots.

What is User-Agent?

User-Agent is an HTTP header field that identifies the client software making the request. It typically contains browser name and version, operating system, and device type. Websites use this information to deliver optimized content.

Use Cases

• Web development testing: Simulate different browsers and devices
• Web scraping: Set appropriate UA strings to avoid blocking
• API debugging: Test server-side UA detection logic
• Compatibility testing: Verify website behavior across environments

FAQ

What is a User-Agent string?

A User-Agent (UA) string is identification sent by browsers when visiting websites. It contains browser name, version, operating system, and device information. Websites use this to serve appropriate page versions.

Can I use the generated UA strings directly?

Yes. Generated UA strings are based on real device samples and can be used in browser developer tools, web scraping scripts, or testing setups.

What's the difference between mobile and desktop UA?

Mobile UA strings typically include device model information and a "Mobile" identifier, prompting websites to serve mobile-optimized versions. Desktop UAs contain desktop OS information.

How do I filter UA strings?

Use the browser dropdown to select a specific browser type (Chrome, Firefox, etc.) and the platform dropdown to filter by OS. Combine both filters for precise results.

Is this tool free?

Completely free with no usage limits. All processing is done locally in your browser. No registration or login required, and no usage tracking.