CSS Optimizer is installed as a index.php file into your stylesheet directory. Instead of directing your <link> element to a file1.css file directly, you use the index to retrieve the file: index.php?file1 Or multiple files: index.php?file1,file2,file3 CSS Optimizer removes redundant css information like comments and whitespaces and switches between color names and hexidecimal color values, choosing the one with the minimum number of characters. CSS optimizer does NOT CHANGE YOUR CSS FILE, but saves the optimized content into a separate cache file (filename.cch). Stop waisting your bandwidth! ******* Update! Goto www.roonaan.nl/tools/cssopt if you want to use it as a webtool. Update! Fixed preg to als change capital colors (#FFFFFF) into #FFF as lowercase colors already did. *******