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.
Learn what your user agent is and what it reveals about your web browser, operating system, and mobile device. Find out how to change or fake your user agent and why some sites may detect it.
What Is a User Agent? A browser's user agent string (UA) helps identify which browser is being used, what version, and on which operating system. When feature detection APIs are not available, use the …
28 Oct 2025 · The HTTP User-Agent request header is a characteristic string that lets servers and network peers identify the application, operating system, vendor, and/or ...User-Agent reduction · Pre-user-agent reduction...
The extension enables user-agent spoofing on specific domains only; it is conversely possible to exclude certain domains from spoofing. Check the Options page for more info. 5. You can set per-site user-agent strings 6. There is an option to randomize user-agent strings. 7.
With this extension, you can quickly and easily switch between user-agent strings. Also, you can set up specific URLs that you want to spoof every time.
Apr 9, 2026 · Grab the most up-to-date user agents for Chrome, Safari, Firefox, and Edge. These are essential for web scraping, automated screenshots, and bypassing bot blocks.
Jul 29, 2025 · Discover what a user agent is and how it facilitates web interactions. Learn about User-Agent strings and their role in web optimization.
Introduction A user agent is a text string sent by your browser or script during an HTTP request to identify the client's software and operating environment to the server. It typically includes the browser name, version, operating system, and, occasionally, the device type. Understanding user agents is important in 2025 because they directly influence how websites deliver content, apply bot ...
The User-Agents.Net website provides various user agent lists and technical information about them.
Oct 7, 2023 ... It's historically used as a signal to which browser you're using or what bot you are. Some sites (looking at you Google) use it or some other technique to ...
The HTTP header User-Agent is a request header that sends a characteristic string to web servers, allowing them to identify the Operating System (OS) and browser of the client making the request. Every time your browser connects to a website, it includes the User-Agent field in the HTTP header.
11 Jul 2025 · A user agent is a computer program representing a person, for example, a browser in a Web context. Besides a browser, a user agent could be a ...
There are millions of different types and formats of user agents, we've collected them and organised them by browser type, operating system, platform, ...
The User Agent Accessibility Guidelines (UAAG) documents explain how to make user agents accessible to people with disabilities.
Learn what the User-Agent header is, how it works, and why it is important for web development. See a real example of a User-Agent string used by Googlebot and other tips and concerns.
What is an user-agent? The User-Agent request-header field contains information about the user agent originating the request. This is for statistical purposes, the tracing of protocol violations, and …
Feb 8, 2024 ... A user agent is software used to communicate with the Internet. The user agent software submits requests for Web content on behalf of the user.
I can decipher the users strings from the places in the app that report the raw user agent strings. These are the strings that begin with Mozilla.