CSS Formatter and Optimiser doest exactly what is says on the tin (or web site in this case). The formatter is based on CSS Tiday, an open source command line parser and optimiser for CSS files. The online option takes away the command line and gives your everything in a friendly format. You can customise the optimisation from the compression layout (even creating your own) to compressing colors and mergin shorthand properties. After you run your file it also give you the stats of compression ration and the size before and after.