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.

Statistics based on 3.6M+ analyzed websites. About this data

🔍 Overview

📁 Technology Categories

Standards 20HTML elements 13Browser APIs 12Performance 6Semantic markup 5Legacy 2Networking 2AppsDatabasesHTML editors

⚡ Technologies

We track 55 technologies owned or developed by World Wide Web Consortium, Inc. that are used across the web.

#TechnologyReach
1
Charset

The charset declaration directive, specified via an HTML meta tag or HTTP headers, defines the character encoding used to interpret text in a web document.
2
CSS

A stylesheet language used to control the presentation of and documents, defining layout, colors, typography, and responsive behavior across different devices.
3
HTML

A markup language used to create web pages and is the de facto standard for documents displayed in web browsers.
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.
5
JSON-LD

A lightweight linked data format used to embed structured data into web pages in a machine-readable form.
6
⏳ Lazy loading

A technique to load non-critical images and iframes marked with the loading="lazy" attribute only when needed.
7
DNS Prefetch

The rel="dns-prefetch" attribute on HTML <link> elements instructs web browsers to resolve domain names for external resources before those resources are requested.
8
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.
9
SearchAction

A structured data type from Schema.org that describes a website's search capability.
10
Preconnect

The rel="preconnect" attribute on HTML <link> elements instructs browsers to establish early connections to external origins before resources are requested.
11
Preload

The rel="preload" attribute on HTML <link> elements instructs web browsers to fetch important resources early before they are requested during page rendering.
12
Microdata

An HTML specification used to embed structured metadata within web page content by annotating elements with machine-readable attributes.
13
CSP

The Content-Security-Policy HTTP response header and HTML meta tag define which external websites a web page can load content from.
14
Table Element

The <table> HTML element is used to display tabular data in rows and columns.
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.
16
Video Element

The HTML5 element used to embed and play video content directly in web pages without browser plugins.
17
XMLHttpRequest

A JavaScript API for sending HTTP and HTTPS requests and receiving data from web servers without reloading the current page.
18
Fetch

A modern JavaScript API for requesting network resources and exchanging data between web applications and servers.
19
XHTML

An XML-based markup language that extends HTML 4.
20
Font Element

The <font> HTML element, deprecated since HTML 4.
21
Navigation Timing

A part of the Performance API that provides metrics related to navigation from one page to another.
22
Beacon API

Used to send asynchronous and non-blocking requests to a web server.
23
Template Element

The <template> HTML element, introduced in HTML5.
24
CORS

An HTTP header-based mechanism used to safely bypass same-origin policy and allow requests to other domains.
25
Prefetch

The rel="prefetch" attribute on HTML <link> elements tells the browser to download resources that are likely to be needed for future navigation when the current page is idle.
26
Trace Context

Defines standard HTTP headers and a value format for propagating context information that enables distributed tracing.
27
RDF

A W3C standard model for describing and exchanging graph-based data on the web.
28
PerformanceObserver

A part of the Performance API that is used to monitor performance measurement events.
29
RDFa

An extension to HTML5 that embeds structured metadata within page content by adding attributes based on the data model.
30
Dialog Element

The <dialog> HTML element.
31
Canvas Element

A standard HTML5 element used to render graphics, animations, and interactive visual content through scripting.
32
Object Element

The <object> HTML element.
33
Audio Element

The <audio> HTML element, introduced in HTML5.
34
Text

The plain text document format.
35
XML

A markup language and file format for storing, transmitting, and reconstructing structured data in a platform-independent way.
36
Embed Element

The <embed> HTML element.
37
Frame Element

The <frame> HTML element, deprecated in HTML 5.
38
Geolocation API

Allows web applications to retrieve the user's location, including latitude and longitude.
39
Prerender

A deprecated browser hint that instructed web browsers to preload and render a web page in the background before navigation occurred.

Legacy
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#, and Rust.
41
IndexedDB

A transactional NoSQL database system for the persistent storage of structured data inside a user's browser.

Free
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.
43
WebRTC

A set of APIs and protocols originally developed by Google that enables real-time audio, video, and peer-to-peer data communication in web browsers and mobile applications.
44
Screen Orientation API

Exposes the current type and angle of the device's screen orientation, and dispatches events when it changes.
45
Notifications API

Used to configure and display desktop notifications to the user.
46
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.
47
Bgsound Element

The obsolete <bgsound> HTML element.
48
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.
49
Applet Element

The <applet> HTML element, deprecated in HTML 4.01.
50
Web Audio API

A browser API for processing and generating audio in web applications.
51
IndieAuth

A decentralized identity protocol built on top of OAuth 2.0.
52
Micropub

An HTTP-based client-server protocol used to create, update, and delete posts on servers using third-party clients.
53
Math Element

The <math> HTML element.
54
XSLT

A language designed for transforming XML documents into other documents.
55
Amaya

A discontinued open-source WYSIWYG web editor.

FreeOpen sourceLegacy

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