You can check up to 5 pages at a time. 3.2 Bobby is a Web-based tool that analyzes Web pages for their accessibility to people with disabilities. Web Content Accessibility Guidelines . You can evaluate a single web page or download Bobby 3.2 to evaluate your whole site . It's impossible for any program to fully check web accessibility.
Human judgment is needed.
It also does some automated checks. But see the caveats . Check Your Page , Version 3.0, May 8, 2000. This tool runs Bobby, Lynx Viewer, the WAVE, and the CSS Validator. Currently, only publicly available web pages are available to the analysis tools.