WAVE is a suite of evaluation tools that helps authors make their web content more accessible to individuals with disabilities. WAVE can identify many accessibility and Web Content Accessibility Guideline (WCAG) errors, but also facilitates human evaluation of web content. Our philosophy is to focus on issues that we know impact end users, facilitate human evaluation, and to educate about web accessibility.

You can use the online WAVE tool by entering a web page address (URL) in the field above. WAVE Chrome, Firefox, and Edge browser extensions are available for testing accessibility directly within your web browser - handy for checking password protected, locally stored, or highly dynamic pages.


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The WAVE subscription API and Stand-alone WAVE API and Testing Engine are powerful tools for easily collecting accessibility test data on many pages. The stand-alone API and Testing Engine can be integrated into your infrastructure for testing intranet, non-public, and secure pages, including in continuous integration processes.

Your Accessibility IMpact (AIM) assessment report provides detailed WAVE test data, your site's AIM score (a measure of end user impact compared to web pages generally and as determined by human testers), and expert manual test results to give you insights into the accessibility of your web site for users with disabilities.

The Authoring Tool Accessibility Guidelines (ATAG) 2.0 provides guidelines for designing web content authoring tools that are both more accessible to authors with disabilities (Part A) and designed to enable, support, and promote the production of more accessible web content by all authors (Part B). See Authoring Tool Accessibility Guidelines (ATAG) Overview for an introduction and links to ATAG technical and educational material.

This is W3C Recommendation (standard) of the Authoring Tool Accessibility Guidelines (ATAG) version 2.0. This document includes recommendations for assisting authoring tool developers to make their authoring tools more accessible to people with disabilities, including auditory, cognitive, neurological, physical, speech, and visual disabilities.

It is important to note that while the requirements for meeting these two sets of user needs are separated for clarity within the guidelines, the accelerating trend toward user-produced content means that, in reality, they are deeply inter-connected. For example, when a user participates in an online forum, the user frequently authors content that is then incorporated with content authored by other users. Accessibility problems in either the authoring user interface or the content produced by the other forum users would reduce the overall accessibility of the forum.

The individuals and organizations that may use ATAG 2.0 vary widely and include authoring tool developers, authoring tool users (authors), authoring tool purchasers, and policy makers. In order to meet the varying needs of these audiences, several layers of guidance are provided:

In order to ensure that the process of using ATAG 2.0 and WCAG 2.0 together in the development of authoring tools is as simple as possible, ATAG 2.0 shares WCAG 2.0's three level conformance model: Level A (lowest), AA (middle), AAA (highest). For more information, see Understanding Levels of Conformance.

When implementing ATAG 2.0, authoring tool developers should carefully integrate features that support more accessible authoring into the same "look-and-feel" as other features of the authoring tool. Close integration has the potential to:

Conformance means that the authoring tool satisfies the applicable success criteria defined in the guidelines section. This conformance section describes conformance and lists the conformance requirements.

At the time of publishing, WCAG 2.0 [WCAG20] is the current W3C Recommendation regarding web content accessibility. For this reason, ATAG 2.0 refers to WCAG 2.0 when setting requirements for (1) the accessibility of web-based authoring tool user interfaces (in Part A) and (2) how authors should be enabled, supported, and guided toward producing web content that is more accessible to end users with disabilities (in Part B).

In particular, ATAG 2.0 refers to WCAG 2.0 within its definition of the term "accessible content" (and related terms, such as "accessible template"). The definition of "accessible content" is content that would conform to WCAG 2.0, at either Level A, AA, or AAA, under the assumption that any web content technologies that are relied upon to satisfy the WCAG 2.0 success criteria are accessibility supported. The phrase "at either Level A, AA, or AAA" takes into account that the definition of "accessible content" can differ depending on the context of use (e.g. in a Level A success criterion of ATAG 2.0 versus in a Level AAA success criterion). The definition also includes two notes:

Part of conformance to WCAG 2.0 is the requirement that "only accessibility-supported ways of using technologies are relied upon to satisfy the WCAG 2.0 success criteria. Any information or functionality that is provided in a way that is not accessibility supported is also available in a way that is accessibility supported." In broad terms, WCAG 2.0 considers a web content technology to be "accessibility supported" when (1) the way that the web content technology is used is supported by users' assistive technology and (2) the web content technology has accessibility-supported user agents that are available to end users.

This concept is not easily extended to authoring tools because many authoring tools can be installed and used in a variety of environments with differing availabilities for assistive technologies and user agents (e.g. private intranets versus public websites, monolingual sites versus multilingual sites). Therefore:

ATAG 2.0 does not include the accessibility-supported requirement. As a result, ATAG 2.0 success criteria do not refer to WCAG 2.0 "conformance", and instead refer to "meeting WCAG 2.0 success criteria".

Once an authoring tool has been installed and put into use, it would be possible to assess the WCAG 2.0 conformance of the web content that the authoring tool produces, including whether the WCAG 2.0 accessibility-supported requirement is met. However, this WCAG 2.0 conformance assessment would be completely independent of the authoring tool's conformance with ATAG 2.0.

This conformance option may be selected when an authoring tool can be used to produce accessible web content (WCAG) without additional tools or components. The level of conformance is determined as follows:

This conformance option may be selected when an authoring tool would require additional tools or components in order to conform as a complete authoring system. This option may be used for components with very limited functionality (e.g. a plug-in) up to nearly complete systems (e.g. a markup editor that only lacks accessibility checking functionality).

The level of conformance (A, AA, or AAA) is determined as above except that, for any "no" answers, the tool must not prevent the success criteria from being met by another authoring process component as part of a complete authoring system.

Note 1: Authoring tools would not be able to meet partial conformance if they prevent additional authoring process components from meeting the failed success criteria (e.g. for security reasons).

 Note 2: The Part A Conformance Applicability Notes and Part B Conformance Applicability Notes must be applied.

This conformance option may be selected when an authoring tool is unable to meet one or more success criteria because of intrinsic limitations of the platform (e.g. lacking a platform accessibility service). The (optional) explanation of conformance claim results should explain what platform features are missing.

If an authoring tool is capable of producing multiple web content technologies, then the conformance may include only a subset of these technologies as long as the subset includes both any technologies that the developer sets for automatically-generated content or that the developer sets as the default for author-generated content. The subset may include "interim" formats that are not intended for publishing to end users, though this is not required.

ATAG 2.0 may be applied to authoring tools with workflows that involve live authoring of web content (e.g. some collaborative tools). Due to the challenges inherent in real-time publishing, conformance to Part B of ATAG 2.0 for these authoring tools may involve some combination of support before (e.g. support in preparing accessible slides), during (e.g. live captioning as WCAG 2.0 requires at Level AA) and after the live authoring session (e.g. the ability to add a transcript to the archive of a presentation that was initially published in real-time). For more information, see Implementing ATAG 2.0 - Appendix E: Authoring Tools for Live Web Content.

Note: As with any software application, authoring tools can be collections of components. A conformance claim can only be made by a responsible entity. Any other attempted "claims" are, in fact, reviews.

ANDI is like having an expert at your side,helping you ensure your website is meeting accessibility standards.Include ANDI in screenshots during your manual accessibility review.Use ANDI during development to help you build accessible websites.

We are committed to create and grow usage of accessible technology, expand skilling and hiring opportunities for people with disabilities, and advocate for policies that advance accessibility as a fundamental right.

This free, virtual, community event brings together people with disabilities, allies, and industry professionals to Imagine, Build, and Include the future of disability inclusion and accessibility. We are thrilled to share on-demand content from our 13th annual Ability Summit.

Date: Information on specific evaluation tools is updated frequently, as we receive it. In the "Detailed Information" for each tool, there is an "Information updated:" date. This user interface was updated in March 2016. The list was first published in March 2006. 2351a5e196

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