https://en.wikipedia.org › wiki › User_agent

User agent - Wikipedia

On the Web, a user agent is a software agent responsible for retrieving and facilitating end-user interaction with Web content. [1] This includes all web browsers, such as Google Chrome and Safari, some email clients, standalone download managers like youtube-dl, and other command-line utilities like cURL.

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https://whatismyuseragent.com

What is my user agent

Your user agent is a string that web servers use to identify your browser and optimize content delivery. Learn what a user agent is, how to troubleshoot browser issues, and see your user agent details on this site.

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https://deviceatlas.com › sites › default › files › files › DeviceAtlas_The_Complete_Guide_To_User-Agents_2025.pdf

PDF The complete guide to User-Agents - DeviceAtlas

What is a User-Agent string? A User-Agent (UA) string is a piece of text that devices send to web servers stating what kind of device and browser are being used. In simple terms, it acts as the messenger (agent) between the device and the web server. Websites use this information to show visitors the correct version of their site. It is a standard part of web architecture and is passed by all ...

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