Web documents need to have valid HTML. If you do not use the correct syntax and style, your pages may not be accessible to all users. On-line HTML validators will check your HTML code to make sure that it is valid and will work on multiple browsers.

The Bobby Validator will also check for compliance to the World Wide Web Consortium standards, especially for computer reader software for the blind. A validator will suggest changes that will make your document compliant with the W3C guidelines. After making the suggested changes, you will need to upload your files again to the UAF server.