Slimmer at gos.i
Embed this image by adding following code in your web-page.
  <a href="http://getopensource.info/slimmer" title="Slimmer at getOpenSource.info">
    <img src="http://getopensource.info/slimmer/svg/slimmer.svg" alt="Slimmer at gos.i" />
  </a>

Slimmer

HTML, XHTML, CSS, JavaScript optimizer

slimmer.py is a whitespace optimizer for CSS, HTML and XHTML output. It's written by Peter Bengtsson.