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.
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.
Get your users agent string, web browser, opera system, device information and more... Useragent is a small piece of data that is sent by your web browser when accessing a website or application.
7 июл. 2025 г. — Заголовок запроса User-Agent - это строка с характеристиками, по которым сервера и сетевые узлы могут определить тип приложения, ...
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 ...
UserAgents.io provides a simple way to parse a user agent and get technical information about it. The database is updated daily and easy to navigate.
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 extension is designed to shield your online privacy and make it super easy to appear as if you're browsing from different devices.
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.
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.
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
A User-Agent refers to the software used on the client side to access servers based on specific protocols.
NEW LIST: List of User-Agent strings The standard way to pass information to the server about the visiting device is to include it in the User-Agent (UA) string. This information typically passes the name and version of the browser among many other details.
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 ...
2 дня назад — Разберём ежедневку: User-Agent, куки, хедеры, отпечатки устройств, IP и ... User-Agent (UA) — это текстовая строка, которую браузер ...
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.
Подменяет User-Agent на веб-сайтах, пытающихся собрать информацию о ваших путешествиях по сети и выдать не нужное вам содержимое.
18 авг. 2025 г. — User-Agent — незаметный, но важный элемент взаимодействия в интернете. Он помогает пользователям получать оптимизированный контент, а ...
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 ...
21 апр. 2025 г. — Агент пользователя — это программный компонент, который отправляет запросы к серверу и получает ответы, представляя их пользователю. Наиболее ...
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.
A user agent is a software application or program that acts on behalf of a user when interacting with web servers.
Every website you visit sends a digital fingerprint through the User Agent (UA) header — a textual snippet that reveals far more than just the browser name. This subtle but critical HTTP header acts as a window into the client environment, disclosing software identity, operating system, device type, and even browser version.
User agent — идентификационная строка клиентского приложения; обычно используется для приложений, осуществляющих доступ к веб-сайтам — браузеров, ...
Beginner's Guide to User-Agent HTTP Headers in Testing Learn what a User-Agent Header is, how it works, and how to test it effectively. Use Requestly to modify and test different User-Agent strings easily.
But we've got collections of the latest user agents grouped by operating system - so by looking for "latest windows user agents" you'll get the latest user agents for all the major browsers that run on Windows.
7 окт. 2025 г. — User Agent — это «визитка», которую ваш браузер протягивает каждому сайту, когда вы к нему обращаетесь. Там написано, каким браузером вы ...
Discover what a user agent is and how it facilitates web interactions. Learn about User-Agent strings and their role in web optimization.
Your user agent is a string that web servers use to identify your browser and optimize content delivery. Learn what a user agent is, how to troubleshoot browser issues, and see your user agent details on this site.
The User-Agents.Net website provides various user agent lists and technical information about them.
Проанализируйте любую строку User-Agent, которую вы хотите понять, чтобы сделать строку User-Agent читаемой. Мы покажем вам, что такое User Agent; ...
What is a user agent? 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.
This document defines a set of Client Hints that aim to provide developers with the ability to perform agent-based content negotiation when necessary, while avoiding the historical baggage and passive fingerprinting surface exposed by the venerable User-Agent header.
This site did not provide any description.
The User Agent Accessibility Guidelines (UAAG) documents explain how to make user agents accessible to people with disabilities. User agents include browsers, browser extensions, media players, readers and other applications that render web content.