HTML Cleaner

[solidghost]

http://www.tarma.com/index.htm#/products/hclean/index.htm

HTML Cleaner removes superfluous white space, quotes, comments, and end tags from HTML documents. The result will render identically in a web browser, but is typically 15-20% smaller than the original file. This reduces download time, web page responsiveness, and web server storage demands.

Optionally, HTML Cleaner can also remove images, styles, scripts, and active content from HTML documents. Use this if you want to test your HTML document's behaviour in situations where image downloads are switched off or not applicable (text-only browsers, screen readers), style sheets are not supported, or active content is disabled.

[Darksat]

Im sure there is an online tool somewhere that will do that as well.
Remember to save a copy of the file before compressing though, cause editing a compressed file is a pain in the ass.

[Gracia]

THat sounds cool. But do you know anything like this for a php site?