What Is My User Agent?

Your browser sends the following User Agent string with every request.

Parsed Details

Browser
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Operating System (OS)
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Device
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CPU Architecture
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What is a User Agent?

A User Agent (UA) is a string of text that your web browser sends to every website you visit. It acts like a digital name tag, identifying your browser, its version number, and your operating system to the web server. This allows the server to understand what kind of device is accessing it.

What is it Used For?

Content Adaptation: Web servers can use the User Agent to serve different versions of a website optimized for specific browsers or devices. For example, it might send a simpler, mobile-friendly version of a site to a phone, and a full-featured version to a desktop computer.
Web Analytics: Services like Google Analytics use the User Agent to gather statistics on which browsers and operating systems visitors are using. This helps website owners understand their audience's technology.
Troubleshooting & Development: Developers use the User Agent to identify and debug issues that may only occur on a specific browser, version, or operating system.
Bot Detection: Servers can identify web crawlers like Googlebot by their unique User Agent strings.

Examples of User Agent Strings

User Agent strings can vary greatly. Here are a few examples:

Chrome on Windows 10:

Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/125.0.0.0 Safari/537.36

Safari on an iPhone:

Mozilla/5.0 (iPhone; CPU iPhone OS 17_5_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/17.5 Mobile/15E148 Safari/604.1

Googlebot (Google's Web Crawler):

Mozilla/5.0 (Linux; Android 6.0.1; Nexus 5X Build/MMB29P) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/41.0.2272.96 Mobile Safari/537.36 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)