[DvdGiessen]

Reminds me of a cleaner tool I wrote about 10+ years ago, a huge single God-class which would parse an HTML string, allowed me to do various transformations on the object tree, and rerendered the entire source code in correct and nicely indented XHTML. Back then I had unused server capacity, so I often used it to do compression of dynamically rendered pages from for example message boards. Also allowed me to place a badge bragging about my 100% W3C validator score, since the original software packages often did not produce such clean HTML. :p The code is actually still being run on every pageload for some old sites I never updated much since.

It has a tiny little webinterface a which remains online today on some underpowered server. Doesn't work well with anything except XHTML though. http://htmlcleaner.blackholestudios.nl/