Web Accessibility Checker

The Stanford Online Accessibility Program's Web Accessibility Checker is a programmatic tool that can analyze individual web pages and test for various access barriers that may be present. It can check live code via URL, or you my supply a working file for evaluation. The Checker produces a report of all accessibility problems for your selected guidelines. The Checker identifies 3 types of problems:

• Known Problems: These are problems that have been identified with certainty as accessibility barriers. You must modify your page to fix these problems;
• Likely Problems: These are problems that have been identified as probable barriers, but require a human to make a decision. You will likely need to modify your page to fix these problems;
• Potential Problems: These are problems that AChecker cannot identify, that require a human decision. You may have to modify your page for these problems, but in many cases you will just need to confirm that the problem described is not present.

The Checker also can be used to connect to the W3C code validation service, which can review your source code for syntax conformance.

The Checker is offered as a free service to content creators seeking to achieve accessible web pages. As a tool however, it has its limitations, and interpretation and understanding of the requirements and Success Criteria is an integral part of achieving accessible content. The Stanford Online Accessibility Program (SOAP) has been created to provide guidance and assistance in this area to all content producers within the stanford.edu domain. University Faculty, Staff and Students are encouraged to contact the SOAP office for more details.

To begin, enter your URL of HTML code in the fields below: