Bobby will help analyse web pages for major technical accessibility problems, it is best suited to quickly identifying Priority 1 problems. Although there is an online checker available for development purposes we strongly recommend that development teams arrange to purchase the desktop version of the product. The desktop version can also be run in command-line mode taking a list of URLs to be checked as input - this may be a more efficient approach to take during testing for large sites and/or those where content is dynamically generated.
HTML techniques for web accessibility
Markup Validation Service - check the validity of your HTML/XHTML
Web accessibility evaluation tools - use the online tools in this list to check the accessibility of your pages.