It's a short, technical description of the web browser, operating system, (and maybe mobile device) that you're using as you access the internet. Your web browser sends it to every website you visit.
What is a user agent? A user agent is a small piece of text that your web browser or script sends during an HTTP request to identify the client's software and operating system to the web server.
The agent's user account is a specialized identity type designed to bridge the gap between agents and human user capabilities. The agent's user account enables AI-powered applications to interact with systems and services that require user ...
User-agent checker instantly tells your browsers user agent. User-agent is the identifier which lets the server know what browser is requesting the resource or what operating system the request initiator uses.
Usage example: You can alter your user-agent string to indicate you?re on a mobile device if you prefer seeing mobile versions of sites so they load quicker. -- This extension allows you to spoof your browser "user-agent" string to a custom designation, making it impossible for websites to know specific details about your browsing arrangement.
A user agent is a small piece of data sent by your web browser when accessing a website or application. It identifies the type of browser, device, operating system, and browser version.
The HTTP User-Agent request header is a characteristic string that lets servers and network peers identify the application, operating system, vendor, and/or version of the requesting user agent.
Running this extension can have performance impact on your browsing experience due to its need to intercept and modify the data communicated to the server. NOTE: if some sites have problems after using a mobile user-agent, and won't switch back no matter what you spoof, you will need to switch the user-agent back to Chrome *and* clear your cookies for the sites to treat the browser normally again.
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Most common User Agent list up to date. Essential for web scraping, testing, and bot development. Covers browsers, crawlers, and AI agents. Updated weekly.
On the Web, a user agent is a software agent responsible for retrieving and facilitating end-user interaction with Web content. 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 ...
What is a user agent string, and how do websites use it to track you? Learn how to inspect and safely change your browser user agent with Gologin.
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 automated recognition of user agents for the sake of tailoring responses to avoid particular user agent limitations.
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.
The User-Agents.Net website provides various user agent lists and technical information about them
Spoofs & Mimics User-Agent strings. Spoofs & Mimics User-Agent strings. Ever needed to quickly switch between user-agent strings on the fly? Developing a site that needs to work on both mobile browsers and desktop browsers? Sick of some archaic site blocking you because you're not using Netscape 4? The User-Agent Switcher for Chrome is the answer. With this extension, you can quickly and ...
Learn how to decode and understand any user agent string sent by your web browser or other software. Use this tool to parse user agents by browser, OS, platform, hardware, software type and layout engine.
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.
This extension is designed to shield your online privacy and make it super easy to appear as if you're browsing from different devices.
A user agent is a computer program representing a person, for example, a browser in a Web context.
Displays the browser User-Agent and other useful device info. Data can be shared by email, text, etc. NOTE: Some phones may report a different default User-Agent from within apps (such as this) compared to the browser. Be sure to double-check. Suggestions for improvements and additional features are welcome.
This tool can parse HTTP headers (such as the User-Agent and User-Agent Client Hints) to provide information on the associated device, operating system, and browser.
User agents include many operating systems; email clients; PDF, ebook, and image viewers; credential managers, including digital wallets; and many other kinds of software. A web user agent is any software entity that interacts with websites outside the entity itself, on behalf of its user, ...
When a scraper gets blocked, changing the user agent is the first thing most people try. Years ago that was real stealth advice. In 2026 it barely moves the ... Published 1 month ago
User-Agent Switcher and Manager is a free Chrome extension developed by rynu.smith.
The User-Agent (UA) string is contained in the HTTP headers and is intended to identify devices requesting online content. The User-Agent tells the server what the visiting device is (among many other things) and this information can be used to determine what content to return.