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. 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 ...
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.
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.
Jul 11, 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 bot scraping ...
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.
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 user agent string format is currently specified by section 10.1.5 of HTTP Semantics. The format of the user agent string in HTTP is a list of product tokens (keywords) with optional comments. For example, if a user's product were called WikiBrowser, their user agent string might be WikiBrowser/1.0 Gecko/1.0. The "most important" product component is listed first. The parts of this string ...
This extension is designed to shield your online privacy and make it super easy to appear as if you're browsing from different devices.
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.
A user agent, or UA, is a string of information that identifies a user’s browser and operating system. When you visit a website, your Internet browser sends information to the web page about your web browser, operating system, device, screen resolution, and more.
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.
The user-agent is sent by the browser to a web server with each network request, and it’s supposed to show information regarding the user’s system.
User Agent is a text string that web browsers and other client applications send to web servers as part of HTTP request headers to identify themselves.
A user-agent is a string of text, numbers, and symbols that specify the details of a client accessing a server.
To better understand what hosts are using this specific user agent string, I can take a look at the raw data. The data used for this search was only the last 7 days. # read web honeypot json files # cat /logs/webhoneypot*.json # search for values that do not have a blank user agent # jq -r 'select(.useragent!="")' # search for our specific user agent string (Windows 7, Firefox 22) # jq -r 'select(.useragent[]=="Mozilla/5.0 (Windows NT 6.1; WOW64; rv:22.0) Gecko/20100101 Firefox/22.0")' # output the source IPs, sorted by the number of times the source IP was seen # jq -r .sip | sort | uniq -c | sort -n cat /logs/webhoneypot*.json | jq -r 'select(.useragent!="")' | jq -r 'select(.useragent[]=="Mozilla/5.0 (Windows NT 6.1; WOW64; rv:22.0) Gecko/20100101 Firefox/22.0")' | jq -r .sip | sort | uniq -c | sort -n 831351 80.243.171.172
Your browser sends its user agent to every website you connect to.
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.
Apr 25, 2009 ... A user agent is simply the program that contacts the web server on behalf of the user. Majority of user agents are general purpose browsers.
The user agent or agent is the identifier or name with which a program logs in to the web server to request a document. The name is passed through the HTTP header.
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.
Google Admin Toolbox Useragent ; Mozilla Compatibility, Mozilla 5.0 ; Platform, Linux; Android 6.0.1; Nexus 5X Build/MMB29P ; Layout Engine, AppleWebKit 537.36 ...
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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.
The User-Agents.Net website provides various user agent lists and technical information about them.
Understand user agents, their role in bot detection, and how to customize them ethically for scraping and automation. Get tips and tools for testing in 2025.
The User-Agent Header is a component of an HTTP request that communicates information about the client software making the request. It tells the server what type of browser, device, operating system, and sometimes rendering engine is being used.
A user agent is a piece of software that acts on behalf of a user, typically a web browser, and identifies itself to web servers when making requests for resources such as web pages or images.
The user-agent string was designed as a way for clients (web browsers, for example) to introduce themselves to servers. It enabled servers to deliver content optimized for different browsers or to understand the capabilities of the client requesting the information.
Along with every request to a server, browsers include a User-Agent HTTP header with a value called a user agent (UA) string. This string is intended to identify the browser, its version number, and its host operating system.
It allows you to choose from a very modest list of preloaded User Agents, as well as add save your own UAs for future use. As with the Chrome extension, changing the User Agent means the whole browsing experience changes. User Agent strings are passed in the HTTP request in which some browser and device specific information is conveyed.
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 ...