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.
Learn what a user agent is, how the user-agent header works, and how to customize the browser user agent ethically for scraping and automation in 2026.
Host : ads.google.com User-Agent : Internet-Explorer-6 Cookie : [redacted] __ar={"1":"kCTeqs1F4ME","2":"12240","3":"387719230"} Where in the __ar parameter, 1 was the ID of the vi
Learn what your user agent is and what it reveals about your web browser, operating system, and mobile device. Find out how to change or fake your user agent and why some sites may detect it.
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.
Jul 11, 2025 ... Besides a browser, a user agent could be a bot scraping webpages, a download manager, or another app accessing the Web. Along with each request ...
Sick of some archaic site blocking you because you're not using Netscape 4? The User-Agent Switcher for Chrome is the answer. With this extension, you can ...
Jul 1, 2026 ... 0:00 Why everyone changes their user agent first ; 0:24 What a user agent actually is ; 1:01 The three places your browser reveals its identity ; 1 ...
Dec 10, 2019 ... A browser's User Agent is a line of text that is sent from the browser to the website when it connects, telling the site which platform ( ...
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.
Network Working Group T. Berners-Lee Request for Comments: 3986 W3C/MIT STD: 66 R. Fielding Updates: 1738 Day Software Obsoletes: 2732, 2396, 1808 L. Masinter Category: Standards
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Instantly see your user agent and decode it — your browser, version, OS, and device explained in plain English, plus how to change it. Free, no sign-up.
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Spoofs & Mimics User-Agent strings. Spoofs & Mimics User-Agent strings. Ever needed to quickly switch between user-agent strings on the fly? Developing a site that needs to work on both mobile browsers and desktop browsers? Sick of some archaic site blocking you because you're not using Netscape 4? The User-Agent Switcher for Chrome is the answer. With this extension, you can quickly and ...
Network Working Group T. Berners-Lee Request for Comments: 1866 MIT/W3C Category: Standards Track D. Connolly November 1995 Hypertext Markup Language - 2.0 Status of this Memo Thi
User-agent Attributes User-agent OS Attributes User-agent Attributes Describes user-agent attributes. Attributes: Key Stability Value Type Description Example Values user_agent.name string Name of the user-agent extracted from original.
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.
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Apr 13, 2024 ... For example, a user agent string might look like this: "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/ ...
[ contents ] WAI-ARIA 1.0 User Agent Implementation Guide A user agent developer's guide to understanding and implementing Accessible Rich Internet Applications W3C Recommendation
[ contents ] WAI-ARIA 1.0 User Agent Implementation Guide A user agent developer's guide to understanding and implementing Accessible Rich Internet Applications W3C Recommendation
Learn about User-Agent, the client-side software identifier transmitted via HTTP headers for web server interaction. Explore its use in browser detection, cross-browser compatibility, and how F5 BIG-IP iRules simplifies User-Agent-based…
WhatIsMyBrowser Developers API Explore User Agents Parse User Agents Learn API Available Homepage User Agents Notes User Agent fragment notes It can be really hard to track down w
WhatIsMyBrowser Developers API Explore User Agents Parse User Agents Learn API Available Homepage Learn Browser Detection User Agents Unknown User Agent fragments Unknown user age
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Sep 3, 2008 ... History of the browser user-agent string ... In the beginning there was NCSA Mosaic, and Mosaic called itself NCSA_Mosaic/2.0 (Windows 3.1), and ...
The user agent checker displays the string text your web browser sends in the "User-Agent" header in the HTTP requests. The user agent Information identifies ...
4 days ago ... A user agent must mediate between the Web and its user, explaining what is happening in a form the user can understand. When the user agent ...
Feb 10, 2026 ... The primary goal of User Agent Client Hints is to reduce the amount of default entropy exposed to the web at large through the User-Agent header ...
The What is My User Agent tool is an absolutely free-to-use dev utility on BetterBugs.io. This tool instantly reads the User-Agent header your browser is ...