Other Recommended Web Validators

Reviewers recommend using the following web accessibility validators but do not have as much experience using these resources.

Feed Validator

Description: Checks news feeds in formats like ATOM and RSS.
Reviewer Comments: This is a good tool for validating news feeds that checks the feed against the W3C standards.

Hera

Description: A web-based system that performs some automated WCAG 1.0 testing, then guides a user through tests which need to be done or confirmed manually. Hera is multilingual (you can change on the fly), and a translation interface is available to easily add new languages. Hera development is ongoing, and is mostly in Spanish. The system is written in PHP and is available for adaptation under the GPL open-source license. ---Hera will check your page for any accessibility issues and highlight them for you to make them easy to find, analyze and fix if necessary.
Reviewer Comments: This tool provides a different way of viewing the validation of a web page. The accuracy and reliability may not be as high as tools from the W3C.

UITest.com

Description: Want to avoid running your site through a variety of different online accessibility checkers? Simply use this one easy form instead. It runs your content through dozens of sites to check everything from quality to your Google Page Rank.
Reviewer Comments: A useful link to a list of validators grouped by the types of validations they do. However, some of the reports generated by the validators are not easy to read and some of the validators do not work at all.

Validation Service

Description: A free service that checks Web documents in formats like HTML and XHTML for conformance to W3C Recommendations and other standards.
Reviewer Comments: This tool works well to validate the chosen web page against the W3C standards.

Visolve

Description: Visolve is software that transforms the computer display colors into the discriminable colors for various people with color blindness. One of its aims is to help people with color blindness guess a normal color. In addition to the color transformation, it provides the following two functions: the filtering darkens all colors other than the specified color, and the hatching draws different hatch patterns depending on color.
Reviewer Comments: This is a tool to help people understand how colors in images appear to those who are color blind. Seems directed to analysis of image data for images that might be included on a web site.

WAVE

Description: WAVE exposes errors and highlights content where accessibility considerations require human judgment (e.g. WAVE exposes alternative text so a human evaluator can determine whether it is appropriate for the image). Icons are used as feedback elements within the web page being evaluated.
Reviewer Comments: This is a very thorough accessibility evaluator. The only problem is that The report is a copy of the web page with added icons that are represent web accessibility errors. To understand the meanings of the graphics you must navigate to another web page.

Web Accessibility Toolbar [For Opera]

Description

The Web Accessibility Toolbar has been developed to aid manual examination of web pages for a variety of aspects of accessibility. It consists of a range of functions that:

Identify components of a web page
Facilitate the use of 3rd party online applications
Provide links to references and additional resources

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