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.
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.
The User-Agents.Net website provides various user agent lists and technical information about them.
Ein User Agent (englisch user „Benutzer“, agent „Mittler, Stellvertreter, Beauftragter“) ist eine clientseitige Anwendung zur Nutzung eines Netzwerkdienstes ...
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.
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 limit functionality per browser, whether it's because a browser legitimately lacks a feature or they just want you to use another browser. I spoof chrome on Google Search to get access to labs just fine, but doing the same on Docs gave me issues. More on reddit.com
Diese Seite zeigt Ihnen, was Ihr Webbrowser im "User-Agent" -Header für Ihre HTTP-Anfragen sendet. Möchten Sie wissen, welche Header Ihr ...
Unter dem User Agent versteht man einen Teil des HTTP-Headers, der bei einem HTTP-Request übermittelt wird. Der User Agent übermittelt dem Server dabei einige ...
22.01.2024 · Ein User Agent ist eine Softwareanwendung oder ein Programmcode, der auf einem Endgerät wie einem Computer oder einem Smartphone läuft und dazu ...
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.
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.
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.
Un user agent ou agent utilisateur est une application logicielle cliente qui utilise un protocole réseau particulier ; l'expression est principalement employée ...
A user agent is a computer program representing a person, for example, a browser in a Web context.
02.12.2025 · Während User “echte” Menschen sind, bezeichnen User Agents keine Personen, sondern Programme. Sie führen automatische Datenabfragen beim Server ...
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.
& User Centric. Nous concevons, designons et développons des produits et des expériences digitales sur-mesure : sites web, applications mobiles, apps dans ...
This extension is designed to shield your online privacy and make it super easy to appear as if you're browsing from different devices.
29.12.2022 · Der User-Agent ist ein HTTP-Header, den Dein Browser beim Aufruf einer URL an den Server schickt. Mit dem User-Agent erfährt die Website Deinen ...
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 2026 because they directly influence how websites deliver content, apply bot ...
Der HTTP-User-Agent-Request-Header ist eine charakteristische Zeichenkette, die es Servern und Netzwerkpartnern ermöglicht, die Anwendung, ...User-Agent-Reduktion · Beispiele vor der User-Agent...
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.
Un user agent est un identifiant qui permet à un « agent » de s'identifier sur le web et de donner des informations sur lui-même.
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 ...
Die Erweiterung fügt eine Schaltfläche in der Symbolleiste hinzu, mit der Sie zwischen verschiedenen gängigen User-Agent-Strings wechseln können. Was ist ein ...
Discover what a user agent is and how it facilitates web interactions. Learn about User-Agent strings and their role in web optimization.
What is a User-Agent? A User-Agent refers to the software used on the client side to access servers based on specific protocols.
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.
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.
Traces laissées par votre User-Agent. Le User-Agent est une empreinte numérique envoyée par votre navigateur aux sites web, révélant votre ...
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 known as its user agent string.
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.
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A user agent is a string of text that identifies the browser and operating system to the web server you are connecting to.
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.
Instead, you interact with your browser (like Brave, Chrome, or Safari), which then acts as your agent and communicates with the Web on your behalf. You tell your agent what you want from the Web, and your agent does the work. Generally speaking, a browser user agent is designed to operate in the best interests of its user.
Your browser sends its user agent to every website you connect to.