The HTMLCleaner is based on a experimental PHP class by Black. All copyrights for this site and the cleaner class go to him.
The class completely rewrites XHTML documents to make the source easier to read and improve the W3 validity. Using this interface you can easily test out the class and see the results.
For more information about the HTMLCleaner class, this site, or any other projects by Black, you might as well contact him.