W3C

The World Wide Web Consortium (W3C) is the main international standards organization for the World Wide Web that develops open web technologies and technical specifications for browsers, websites, and internet applications.

It publishes and maintains standards such as HTML, CSS, Semantic Web, WCAG accessibility guidelines, SVG, and DOM APIs, and coordinates their development through working groups involving browser vendors, technology companies, research institutions, and independent contributors.

W3C ranks #1 among the web technology companies we track.
The company's technologies are present on 90.8% of websites.

🔍 Overview

🏠 Website
- w3.org #12,884
💼 Legal name
- World Wide Web Consortium, Inc.
🏤 Headquarters
- Cambridge, Massachusetts, United States
🗓️ Founded
- 1 October 1994 (31 years ago)
🔗 Links
- Wikipedia

📁 Technology Categories

AppsBrowser APIs ¹⁰DatabasesHTML editorsHTML elements ¹³Legacy ²Networking ²Performance ⁶Semantic markup ⁵Standards ²⁰

⚡ Technologies

We track 53 technologies owned or developed by World Wide Web Consortium, Inc. that are used across the web.

#	Technology	Reach
1	Charset Declaration directive, specified via an HTML meta tag or HTTP headers, defines the character encoding used to interpret text in a web document.	88.7%
2	CSS A stylesheet language used to control the presentation of HTML and XML documents, defining layout, colors, typography, and responsive behavior across different devices.	86.8%
3	HTML A markup language used to create web pages and is the de facto standard for documents displayed in web browsers.	85%
4	ARIA A W3C technical specification that defines how to improve the accessibility of web content and applications, particularly those with dynamic interfaces and custom controls.	61.9%
5	JSON-LD A lightweight linked data format used to embed structured data into web pages in a machine-readable form.	37.1%
6	⏳ Lazy loading A technique to load non-critical images and iframes marked with the loading="lazy" attribute only when needed.	31.9%
7	DNS Prefetch The rel="dns-prefetch" attribute on HTML elements instructs web browsers to resolve domain names for external resources before those resources are requested.	30.1%
8	SearchAction A structured data type from Schema.org that describes a website's search capability.	27.1%
9	Web Storage A browser API that provides client-side key-value storage for websites, allowing data to be stored directly in a user's web browser.	27%
10	Preconnect The rel="preconnect" attribute on HTML elements instructs browsers to establish early connections to external origins before resources are requested.	22.8%
11	Preload The rel="preload" attribute on HTML elements instructs web browsers to fetch important resources early before they are requested during page rendering.	20%
12	Microdata An HTML specification used to embed structured metadata within web page content by annotating elements with machine-readable attributes.	15%
13	CSP The Content-Security-Policy HTTP response header and meta tag are used to control what resources a given page can load.	14%
14	Table Element The HTML element represents tabular data and has been widely used in the past for designing layouts.	11.3%
15	Progressive Web App A type of web app that can be installed on a device and run as a standalone application while being delivered through the web.	8.2%
16	Video Element The HTML element, introduced in HTML5.	6.7%
17	XMLHttpRequest A JavaScript API for sending HTTP and HTTPS requests and receiving data from web servers without reloading the current page.	6.2%
18	Fetch A modern JavaScript API for requesting network resources and exchanging data between web applications and servers.	4.8%
19	XHTML An XML-based markup language that extends HTML 4.	4.3%
20	Font Element The HTML element, deprecated since HTML 4.	4%
21	Navigation Timing A part of the Performance API that provides metrics related to navigation from one page to another.	3.5%
22	Beacon API Used to send asynchronous and non-blocking requests to a web server.	3.4%
23	CORS An HTTP header-based mechanism used to safely bypass same-origin policy and allow requests to other domains.	3.3%
24	Template Element The HTML element, introduced in HTML5.	3.2%
25	Prefetch The rel="prefetch" attribute on HTML elements tells the browser to download resources that are likely to be needed for future navigation when the current page is idle.	1.2%
26	Trace Context Defines standard HTTP headers and a value format for propagating context information that enables distributed tracing.	0.9%
27	RDF A W3C standard model for describing and exchanging graph-based data on the web.	0.9%
28	PerformanceObserver A part of the Performance API that is used to monitor performance measurement events.	0.8%
29	RDFa An extension to HTML5 that embeds structured metadata within page content by adding attributes based on the RDF data model.	0.7%
30	Canvas Element A standard HTML element used to render graphics, animations, and interactive visual content through scripting.	0.6%
31	Object Element The HTML element.	0.5%
32	Dialog Element The HTML element.	0.5%
33	Audio Element The HTML element, introduced in HTML5.	0.4%
34	Text The plain text document format.	0.4%
35	XML A markup language and file format for storing, transmitting, and reconstructing structured data in a platform-independent way.	0.3%
36	Embed Element The HTML element.	0.3%
37	Frame Element The HTML element, deprecated in HTML 5.	0.3%
38	Geolocation API Allows web applications to retrieve the user's location, including latitude and longitude.	0.2%
39	Prerender A deprecated browser hint that instructed web browsers to preload and render a web page in the background before navigation occurred. Legacy	0.1%
40	WebAssembly A portable binary instruction format that runs in modern web browsers with near-native performance, enabling frontend coding in languages that were not traditionally used for web interfaces, such as C/C++, C#, and Rust.	0.07%
41	IndexedDB A transactional NoSQL database system for the persistent storage of structured data inside a user's browser. Free	0.05%
42	Webmention A simple protocol to notify any URL when a website links to it, and for web pages to request notifications when somebody links to them.	0.05%
43	Notifications API Used to configure and display desktop notifications to the user.	0.03%
44	Screen Orientation API Exposes the current type and angle of the device's screen orientation, and dispatches events when it changes.	0.03%
45	WCAG The Web Content Accessibility Guidelines are an international standard developed by the W3C that defines how to make web content, including text and media, accessible to people with disabilities.	0.02%
46	Bgsound Element The obsolete HTML element.	0.01%
47	ESI A simple markup language used to define web page components for dynamic assembly and delivery of web applications at the edge of the Internet.	0.01%
48	Applet Element The HTML element, deprecated in HTML 4.01.	0.007%
49	IndieAuth A decentralized identity protocol built on top of OAuth 2.0.	0.005%
50	Micropub An HTTP-based client-server protocol used to create, update, and delete posts on servers using third-party clients.	0.003%
51	Math Element The HTML element.	0.002%
52	XSLT A language designed for transforming XML documents into other documents.	0.001%
53	Amaya A discontinued open source WYSIWYG web editor. Legacy

When interpreting and using the results, please read our methodology and disclaimer.