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.
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.
Find out your user agent string, browser, opera system, device and more with this tool. Learn what a user agent is and how it is used for feature detection and compatibility.
I'm using this JS code to know what browser is user using for. And I want to get this navigator.appName to php code to use it l... More on stackoverflow.com
This extension is designed to shield your online privacy and make it super easy to appear as if you're browsing from different devices.
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.
UAAG 2.0 guides developers in designing user agents that make the web more accessible to people with disabilities. User agents include browsers, browser extensions, media players, readers and other applications that render web content. A user agent that follows UAAG 2.0 will improve accessibility ...
Discover what a user agent is and how it facilitates web interactions. Learn about User-Agent strings and their role in web optimization.
We've collected millions of user agents and have categorised a selection of them here for you, based on many of the things we detect about them - Operating System, Browser, Hardware Type, Browser Type, and so on.
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.
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.
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. Please note that this does not provide improved privacy while browsing the Internet and that some sites might have other means to figure out that the browser is not what it pretends to be.
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.
from browser_use import Agent, Browser, ChatBrowserUse # from browser_use import ChatGoogle # ChatGoogle(model='gemini-3-flash-preview') # from browser_use import ChatAnthropic # ChatAnthropic(model='claude-sonnet-4-6') import asyncio async def main(): browser = Browser( # use_cloud=True, # Use a stealth browser on Browser Use Cloud ) agent = Agent( task="Find the number of stars of the browser-use repo", llm=ChatBrowserUse(), # llm=ChatGoogle(model='gemini-3-flash-preview'), # llm=ChatAnthropic(model='claude-sonnet-4-6'), browser=browser, ) await agent.run() if __name__ == "__main__": asyncio.run(main())
Project Mariner is a research prototype exploring the future of human-agent interaction, starting with browsers. It automates tasks to help boost productivity.
Your browser sends its user agent to every website you connect to.
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 ...
In Chrome (Ver.114 or greater) on mobile devices, the model-key now shows up as 'k' in the useragent, but the correct model can be obtained via javascript. This is equivenlent to the the Operating System(OS) name. e.g. Windows or Android. This is equivenlent to the the Operating System(OS) version, this is usually described as an numbers separated by decimal points to denote Major, Minor and sometimes Patch releases.
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 ...
A user agent is a computer program representing a person, for example, a browser in a Web context.
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.
In computing, the User-Agent header is an HTTP header intended to identify the user agent responsible for making a given HTTP request. Whereas the character sequence User-Agent comprises the name of the header itself, the header value that a given user agent uses to identify itself is colloquially ...
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.
This is a simple utility for users who want to discover the 'user-agent' given by the device by default - "Display browser User-Agent and other useful device info." Bloatware is an odd description for a 1.37MB app.
A user agent is a string of text that identifies the browser and operating system to the web server you are connecting to.
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