User agent string Learn about its structure, applications, and future trends to optimize web experiences for all users. Jan 8, 2021 · A list of major user agent strings for different browsers and devices - user-agents. UserAgentString. 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 agents also play a critical role in web analytics, as they help Parse any User Agent string you want to understand and make the User-Agent string readable. These use cases were actually anticipated User Agent Finder The User Agent Finder tool offered by WebToolBox provides a simple and effective way to identify and retrieve information about your user agent. Websites use this information to show visitors the correct version of their site. Mar 12, 2025 · User-agent strings enable websites to tailor content for devices, enhancing user experience and enabling targeted experiments. Dec 16, 2024 · Closing thoughts User-Agent strings might seem like a jumble of technical jargon, but they're a treasure trove of insights when it comes to understanding and improving web experiences. When you visit a Web page, your browser sends the user-agent string to the server hosting the site that you are visiting. Nov 13, 2025 · Get our free, auto-updating list of the latest user-agents for web scraping. The user agent string is a piece of information that your web browser sends to servers when requesting web pages. Web servers use this information to optimize content delivery and provide a better user experience. This string serves as a unique identifier sent by the browser to the web server, which includes important details about the browser’s type, version, and the operating system in use USER AGENT string decoder is a powerful online tool that plays a crucial role in deciphering the information embedded within a browser's user agent string. 0 and later. Jun 2, 2022 · Usage The HTTP User-Agent request header, also commonly referred to as the User-Agent String or UA-String, is used to convey information to servers about the client’s browser and operating system. It includes Android, iPhone, Windows, tablets, desktops, bots and crawlers, games consoles and more. Master syntax, formats, best practices, and rotation techniques. Irregular Detect user-agent, operating system, browser, and device using several libraries, including ua-parser, ua-parser-js, and platform. Here’s a handy list of UAs that you may want to use. Apr 8, 2010 · The " User-Agent " header field contains information about the user agent originating the request, which is often used by servers to help identify the scope of reported interoperability problems, to work around or tailor responses to avoid particular user agent limitations, and for analytics regarding browser or operating system use. The content of the user agent vary from browsers and operating systems. You can make important decisions on how to handle web traffic based on the User-Agent string, ranging from simple segmentation and redirection, to more complex content adaptation and device targeting decisions. parse an user agent string and get browser type, operating system, developer, software type and device vendor and capabilities Jun 7, 2017 · The User-Agent request header contains a characteristic string that allows the network protocol peers to identify the application type, operating system, software vendor or software version of the requesting software user agent. Get an analysis of your or any other user agent string. We will show you what the User Agent means; whether it is Safari on iPad, Chrome on Windows and other popular systems, or search engine spiders or security analysis tools. DB browsers, email clients Udger database includes detailed information about every single user agent and operating system Understand what information is contained in a user agent string. 2 days ago · The latest user agents for Edge, including the various platforms it runs on. Jul 4, 2025 · Learn how to set a custom User-Agent string to debug browser-specific issues, simulate bots or devices, and test conditional web behavior from any client. userAgent read-only property of the Navigator interface returns the User-Agent (UA) string for the current browser. Utility to parse user agents and get information like operative system device Understand what information is contained in a user agent string. The User Agent string contains information about your web browser name, operating system, device type and lots of other useful bits of information. Sep 28, 2016 · A user agent is a “string” – that is, a line of text – identifying the browser and operating system to the web server. Besides a browser, a user agent could be a bot scraping webpages, a download manager, or another app accessing the Web. You can copy and paste any user agent string and get an analysis of its components, or browse a list of user agent strings from various sources. When a web browser makes a request for website pages, it includes an HTTP header known as the [User Agent], which is a relatively short line of text containing specific details about the browser's specifications. Customizing the user agent can be useful for testing how websites behave under different browsers, for web scraping, and for privacy reasons. What is my user agent string? Instantly view your current user agent with this free online tool. Understand how to decode and utilize this crucial web technology. For a breakdown of changes to the string in Gecko 2. Jul 11, 2025 · User agent A user agent is a computer program representing a person, for example, a browser in a Web context. com Apr 17, 2025 · 2025: List of User-Agent strings A comprehensive list of User Agent strings for the most popular devices in use today. User-agent is the identifier which lets the server know what browser is requesting the resource or what operating system the request initiator uses. Every request your web browser makes includes your User Agent; find out what your browser is sending and what this identifies your system as using five different techniques to detect the real user-agent of your browser. See full list on whatismybrowser. This string typically includes information about the browser's name, version, operating system, and rendering engine. Mar 26, 2025 · This user agent list is perfect for web scrapers looking to blend in, developers, website administrators, and researchers. The user agent string is a piece of information that your browser or device sends to websites, allowing them to understand and Jan 23, 2025 · Change the User Agent String in Edge, Chrome, Firefox, Opera, IE or Safari In the world of web browsing, the user agent string plays a vital role in how a website perceives the device and browser accessing it. This string is intended to identify the browser, its version number, and its host operating system. Choose from preset User-Agent strings, or Add your own custom User-Agent string. Jul 9, 2024 · The User Agent String contains information about a browser's identity. RandomUserAgents. Explore the ins and outs of User-Agent strings, their components, and significance in web browsing. The User Agent String is reported to the web server as an HTTP header every time that a browser makes a request to a web server. This string indicates which browser you are using, its version number, and details about your system, such as operating system and version. 0, see Final User Agent string for Firefox 4 (blog post). Including Android, iPhone, Windows, tablets, desktops, bots & crawlers, games consoles and more. A user agent, or UA, is a string of information that identifies a user’s browser and operating system. Web browsers include the user agent string in the requests they make to websites. However, in recent times, user-agents have become a mess. Aug 19, 2025 · This document describes the user agent string used in Firefox 4 and later and applications based on Gecko 2. Nov 7, 2025 · Browser detection using the user agent string (UA sniffing) Along with every request to a server, browsers include a User-Agent HTTP header with a value called a user agent (UA) string. com is a website that provides information and tools about user agent strings, which are identifiers for web browsers and other web agents. Sep 30, 2024 · 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. This means adapting layouts, features, and performance tweaks based on the information these strings provide. This string often Aug 14, 2024 · User-Agent strings are critical elements that convey specific details about your browser, operating system, and device. This sounds simple, but user agents have become a mess over time. Your user agent is a unique identifier for your browser and device—check it now. In simple terms, it acts as the messenger (agent) between the device and the web server. Find out your user agent string, browser, opera system, device and more with this tool. Spoof it to User-Agent of Google Chrome, Mozilla Firefox, Chrome on Android, Safari on iPhone or macOS, Googlebot or your custom string. Detect your useragent, generate bulk user agents, and learn how to read them free and Every request your web browser makes includes your User Agent; find out what your browser is sending and what this identifies your system as using five different techniques to detect the real user-agent of your browser. When you connect to a website, you are sending your User-Agent in a field in your HTTP header. The User-Agent string is very useful because it gives you information about the software and hardware running on the device making the request. In simple words, a user-agent is actually a string which is one line of text that identifies the operating system to the web server and the browser. With this tool, you can easily find out the user agent string associated with your web browser or device. Along with each request they make to the server, browsers include a self-identifying User-Agent HTTP header called a user agent (UA) string. How do I determine my user agent on an Android device? To identify the user agent on your Android device, open any web browser such as Chrome, type about:version in the address bar, or follow the link and look up the user agent in the information displayed. Unfortunately, most browsers falsify part of their User-Agent header in an attempt to be compatible with more web servers. Find out the format, examples, and purposes of user agent strings for browsers and bots. The User Agent often includes descriptions of the Operating System and Device Type that the Browser/Agent is running The “User Agent Lookup” allows you to retrieve information about user agents from our database. It is a standard part of web architecture and is passed by all Jun 25, 2024 · What is a User Agent? Updated at: Jun 25, 2024 A user agent is a relatively short bit of text that (attempts to) describe the Software/Browser (the "Agent") that is making the request to a website. Oct 28, 2025 · The Navigator. Jun 22, 2024 · Leveraging user-agent strings for enhanced user experiences By analyzing user-agent strings, you can tailor content and functionality to better suit users' devices and browsers. This information is intended to assist in serving the representation of the resource that is best-suited to the client. Understand what information is contained in a user agent string. This can be helpful when you need to change your user agent. Learn how to choose the right user agents to bypass restrictions, mimic real browsers, and extract data effortlessly. Oct 1, 2021 · 2021: List of User-Agent strings Updated for 2021 — a list of User Agent strings for the most popular devices in use today. There are three directives including the product, the version, and a comment Aug 27, 2024 · Explore the intricacies of the user agent in this comprehensive guide. Similarly, it will say the browser on your iPhone is Safari instead of Brave. List of user agents categorized by device and platform. But every browser sends its user agent in a different format, so decoding them can be very tricky. . This string contains details about your browser type, version, and the operating system you are using. May 28, 2025 · 2025: List of mobile browser User-Agent strings Updated for 2025 — In order to get an understanding of which mobile browsers use your site, you need to know their User-Agent strings . Nov 1, 2024 · In this comprehensive tutorial we have discussed what are user agents in web scraping, how to use them effectively and why you should use them when scraping. The most common useragents list is compiled from the user logs data of a number of popular sites across niches and geography, cleansed (bots removed), and enriched with information about the device and browser. The 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. A user agent is a string of text that is sent by a web browser to a web server to identify itself and provide information about the browser's capabilities. Jan 23, 2025 · Latest user agent strings for major browsers and OSs; checks for updates daily - jnrbsn/user-agents Feb 8, 2024 · The Brave browser generates user agent strings that set nonessential data elements to more general values. For example, instead of declaring the browser is Brave, the user agent string will claim the browser is Chrome. Scammers exploit this information by spoofing these strings to mask malicious activities, making fraudulent sites appear legitimate. A user agent is a string that web browsers and other applications send to web servers to identify themselves. Jun 30, 2024 · Using the correct user agent when performing data scraping is crucial for your success in collecting data while avoiding being blocked. Web developers: identify the browsers and devices that your visitors are using Browser detection API User Agents Explore User Agents Fragment meanings Search User Agents User Agent API Use Cases Pricing Documentation API Terms and Conditions Detection Parse User Agents Frontend Library Software & Platforms Unknown fragments General About A User Agent is a short string that web browsers and other applications send to identify themselves to web servers. com - tools for checking, generating, and understanding user agent strings. txt A user agent is a string of text that identifies the browser and operating system to the web server you are connecting to. Oct 28, 2025 · 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. Learn what a user agent string is and how it is used in HTTP requests and responses. Description Custom UserAgent String is an add-on that enables you to easily change your browser's useragent by adding site-specific useragent strings via the options page. What is a User-Agent string? A User-Agent (UA) string is a piece of text that devices send to web servers stating what kind of device and browser are being used. Oct 4, 2018 · A user agent string is sent as a Request Header by the browser and identifies which operating system is in use, the browser version, and other information. Find lists of user agent strings from browsers, crawlers, spiders, bots, validators and others. Learn what a user agent is and how it helps websites and applications customize their behavior and content. Jun 3, 2024 · The user agent string will be displayed under the "Google Chrome" section. Specify in the field below the full user agent string or just a part of it. From tailoring content for different devices to enhancing security and personalizing user interactions, these strings play a crucial role. Every time your browser connects to a website, it includes the User-Agent field in the HTTP header. User-agent checker instantly tells your browsers user agent. They may use automated bots that cycle through various User-Agent strings to dodge detection, facilitating phishing or other attacks. See also this document on user agent sniffing and this Hacks blog post. bructy znqckk exle sgvoy pris nxejubh oclhctc cteb prc oklndfvh euonl biphgy nxkcsz eqtxs qxbj