Hide your secret files INSIDE photos, videos or other files with OmniHide PRO.
This tool can significantly reduce the size and complexity of your CSS by programmatically stripping unneeded content, stripping redundant calls, and intelligently grouping the remaining element names.
Just give the URL to your CSS file and choose some options. It removes the whitespaces but keeps the intends and also removes the comments. The resulting CSS would be 40-80% reduced in size compared to the original CSS.
Try out the CSS Souperdouche