W3C

Web Content Accessibility Guidelines (WCAG) Current Status

This page summarizes the relationships among specifications, whether they are finished standards or drafts. Below, each title links to the most recent version of a document.

Completed Work

W3C Recommendations have been reviewed by W3C Members, by software developers, and by other W3C groups and interested parties, and are endorsed by the Director as Web Standards. Learn more about the W3C Recommendation Track.

Group Notes are not standards and do not have the same level of W3C endorsement.

Standards

2008-12-11

Web Content Accessibility Guidelines (WCAG) 2.0

Web Content Accessibility Guidelines (WCAG) 2.0 covers a wide range of recommendations for making Web content more accessible. Following these guidelines will make content accessible to a wider range of people with disabilities, including blindness and low vision, deafness and hearing loss, learning disabilities, cognitive limitations, limited movement, speech disabilities, photosensitivity and combinations of these. Following these guidelines will also often make your Web content more usable to users in general.

WCAG 2.0 success criteria are written as testable statements that are not technology-specific. Guidance about satisfying the success criteria in specific technologies, as well as general information about interpreting the success criteria, is provided in separate documents. See Web Content Accessibility Guidelines (WCAG) Overview for an introduction and links to WCAG technical and educational material.

WCAG 2.0 succeeds Web Content Accessibility Guidelines 1.0 [WCAG10], which was published as a W3C Recommendation May 1999. Although it is possible to conform either to WCAG 1.0 or to WCAG 2.0 (or both), the W3C recommends that new and updated content use WCAG 2.0. The W3C also recommends that Web accessibility policies reference WCAG 2.0.

1999-05-05

Web Content Accessibility Guidelines 1.0

These guidelines explain how to make Web content accessible to people with disabilities. The guidelines are intended for all Web content developers (page authors and site designers) and for developers of authoring tools. The primary goal of these guidelines is to promote accessibility. However, following them will also make Web content more available to all users, whatever user agent they are using (e.g., desktop browser, voice browser, mobile phone, automobile-based personal computer, etc.) or constraints they may be operating under (e.g., noisy surroundings, under- or over-illuminated rooms, in a hands-free environment, etc.). Following these guidelines will also help people find information on the Web more quickly. These guidelines do not discourage content developers from using images, video, etc., but rather explain how to make multimedia content more accessible to a wide audience.

This is a reference document for accessibility principles and design ideas. Some of the strategies discussed in this document address certain Web internationalization and mobile access concerns. However, this document focuses on accessibility and does not fully address the related concerns of other W3C Activities. Please consult the W3C Mobile Access Activity home page and the W3C Internationalization Activity home page for more information.

This document is meant to be stable and therefore does not provide specific information about browser support for different technologies as that information changes rapidly. Instead, the Web Accessibility Initiative (WAI) Web site provides such information (refer to [WAI-UA-SUPPORT]).

This document includes an appendix that organizes all of the checkpoints by topic and priority. The checkpoints in the appendix link to their definitions in the current document. The topics identified in the appendix include images, multimedia, tables, frames, forms, and scripts. The appendix is available as either a tabular summary of checkpoints or as a simple list of checkpoints.

A separate document, entitled "Techniques for Web Content Accessibility Guidelines 1.0" ([TECHNIQUES]), explains how to implement the checkpoints defined in the current document. The Techniques Document discusses each checkpoint in more detail and provides examples using the Hypertext Markup Language (HTML), Cascading Style Sheets (CSS), Synchronized Multimedia Integration Language (SMIL), and the Mathematical Markup Language (MathML). The Techniques Document also includes techniques for document validation and testing, and an index of HTML elements and attributes (and which techniques use them). The Techniques Document has been designed to track changes in technology and is expected to be updated more frequently than the current document. Note. Not all browsers or multimedia tools may support the features described in the guidelines. In particular, new features of HTML 4.0 or CSS 1 or CSS 2 may not be supported.

"Web Content Accessibility Guidelines 1.0" is part of a series of accessibility guidelines published by the Web Accessibility Initiative. The series also includes User Agent Accessibility Guidelines ([WAI-USERAGENT]) and Authoring Tool Accessibility Guidelines ([WAI-AUTOOLS]).

Group Notes

2014-07-10

Website Accessibility Conformance Evaluation Methodology (WCAG-EM) 1.0

WCAG-EM provides an approach for evaluating how websites - including web applications and websites for mobile devices - conform to WCAG 2.0. It covers different situations, including self-assessment and third-party evaluation.

2014-04-08

Understanding WCAG 2.0

Provides detailed information about the intent of each WCAG 2.0 success criterion and describes benefits, examples, failure conditions, and recommended techniques in various technologies.

2014-04-08

Techniques for WCAG 2.0

Documents authoring practices in various technologies that may be used to satisfy the WCAG 2.0 success criteria.

2013-09-05

Guidance on Applying WCAG 2.0 to Non-Web Information and Communications Technologies (WCAG2ICT)

Describes how the Web Content Accessibility Guidelines (WCAG) 2.0 and its principles, guidelines, success criteria and conformance model can be applied to non-Web Information and Communications Technologies (ICT), including non-web documents and software.

2009-07-09

Relationship between Mobile Web Best Practices (MWBP) and Web Content Accessibility Guidelines (WCAG)

This technical report describes the similarities and differences between the Web Content Accessibility Guidelines (WCAG) and the Mobile Web Best Practices 1.0.

2006-04-25

Requirements for WCAG 2.0

Requirements used for development of WCAG 2.0.

2005-11-23

Inaccessibility of CAPTCHA

A common method of limiting access to services made available over the Web is visual verification of a bitmapped image. This presents a major problem to users who are blind, have low vision, or have a learning disability such as dyslexia. This document examines a number of potential solutions that allow systems to test for human users while preserving access by users with disabilities.

2000-11-06

Core Techniques for Web Content Accessibility Guidelines 1.0

Techniques that apply across technologies for authors of Web content who wish to claim conformance to WCAG 1.0

2000-11-06

CSS Techniques for Web Content Accessibility Guidelines 1.0

This document describes techniques for authoring accessible Cascading Style Sheets (CSS). Cascading Style Sheets are defined by the W3C Recommendations "CSS Level 1" [CSS1] and "CSS Level 2" [CSS2]. This document is intended to help authors of Web content who wish to claim conformance to "Web Content Accessibility Guidelines 1.0" ([WCAG10]). While the techniques in this document should help people author CSS that conforms to "Web Content Accessibility Guidelines 1.0", these techniques are neither guarantees of conformance nor the only way an author might produce conforming content.

This document is part of a series of documents about techniques for authoring accessible Web content. For information about the other documents in the series, please refer to "Techniques for Web Content Accessibility Guidelines 1.0" [WCAG10-TECHS].

Note: This document contains a number of examples that illustrate accessible solutions in CSS but also deprecated examples that illustrate what content developers should not do. The deprecated examples are highlighted and readers should approach them with caution -- they are meant for illustrative purposes only.

2000-11-06

HTML Techniques for Web Content Accessibility Guidelines 1.0

This document describes techniques for authoring accessible Hypertext Markup Language (HTML) content (refer to HTML 4.01 [HTML4]). This document is intended to help authors of Web content who wish to claim conformance to "Web Content Accessibility Guidelines 1.0" ([WCAG10]). While the techniques in this document should help people author HTML that conforms to "Web Content Accessibility Guidelines 1.0", these techniques are neither guarantees of conformance nor the only way an author might produce conforming content.

This document is part of a series of documents about techniques for authoring accessible Web content. For information about the other documents in the series, please refer to "Techniques for Web Content Accessibility Guidelines 1.0" [WCAG10-TECHS].

Note: This document contains a number of examples that illustrate accessible solutions in CSS but also deprecated examples that illustrate what content developers should not do. The deprecated examples are highlighted and readers should approach them with caution -- they are meant for illustrative purposes only.

2000-11-06

Techniques for Web Content Accessibility Guidelines 1.0

Gateway to a series of related documents that provide techniques for satisfying the requirements defined in WCAG 1.0.

Obsolete Specifications

These specifications have either been superseded by others, or have been abandoned. They remain available for archival purposes, but are not intended to be used.

Retired

2003-02-07

Requirements for WCAG 2.0 Checklists and Techniques

This is a W3C Working Draft produced by the Web Content Accessibility Guidelines Working Group (WCAG WG). It describes requirements for Checklists and Techniques described by the Web Content Accessibility Guidelines 2.0 (WCAG 2.0). These requirements are related to but different from Requirements for WCAG 2.0 in that "Requirements for WCAG 2.0 Checklists and Techniques" specifies requirements for the technology-specific documents produced by the WCAG WG while "Requirements for WCAG 2.0" specifies general requirements for the general usability of documents produced by the WCAG WG. The Working Group encourages feedback about these requirements as well as participation in the development of WCAG 2.0 by people who have experience creating Web content that conforms to Web Content Accessibility Guidelines 1.0.