This document discusses the HTML Tidy utility created by Dave Raggett. It summarizes that HTML Tidy is a free tool that automatically fixes common HTML errors and formatting issues to clean up messy code. It can identify accessibility issues and points the user towards areas that need further attention. HTML Tidy works on markup generated by other tools and helps standardize code by bringing it closer to XHTML specifications. The document encourages the use of HTML Tidy to validate code and clean up sloppy HTML.