LibGuides: Web Accessibility: Evaluation Tools

HTML and CSS Validation

Valid page structure and cascading style sheets are vital components of accessible web pages.

W3C CSS Validation Service
Check Cascading Style Sheets (CSS) and (X)HTML documents with style sheets.
W3C Markup Validation Service
This validator checks the markup validity of Web documents in HTML, SHTML, SMIL, MathML, etc.

Color Contrast Checker
Check for sufficient contrast between text and background colors.
Cynthia Says
A web content accessibility validator designed to identify errors in your content related to Section 508 standards and/or the WCAG guidelines. This free tool is intended for educational purposes and only validates one page at a time.
Dr. Watson
Dr. Watson is a free service to analyze your web page on the Internet. Enter to URL of a page and get a report on HTML validity as well as many other aspects of your site, including link validity, download speed, search engine compatibility, and link popularity.
IDI Web Accessibility Checker
This tool checks single HTML pages for conformance with accessibility standards to ensure the content can be accessed by everyone.
WAVE
A free web accessibility evaluation tool provided by WebAIM. WAVE shows the original web page with embedded icons and indicators that reveal the accessibility of that page.