Find CSS difference from two give links

What would be the easiest way to find a difference between two compacted css files. This can't be done at the server side using a diff tool since the final css comes from lo开发者_开发技巧ts of sources.

Is there way to do something similar from the html of a webpage as well??

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I have not used this myself but might give this a try http://gordianlabs.com/cssdiff/index.htm