Site to reduce CSS file "CSS Tweak"

If you upload a CSS file you want to lighter, it seems to delete extra comments and make you lighter by making use of various methods.
CSS Tweak ~ Web Based CSS Tweaker!
http://www.cssdev.com/csstweak/

First, click "Browse", enter the location of the CSS file, click "TWeak", the percentage of what was reduced is displayed, and you can download the CSS file with newly reduced size.

In my case, uploading CSS files on hand has decreased by 37%.
Well I just added comments ...