CSSTrashman is an online tool which allows you to supply a URL and it scans the website and generates a new clean CSS file from the existing styles.
CSSTrashman examines your DOM and then reverse engineers a new CSS stylesheet which captures your existing styling perfectly while cleaning the bloated and ill-maintained CSS of old.
The new CSS file generated can be used as a drop-in replacement for the current stylesheet you are using on your website. CSSTrashman can also generate SASS code if you need it.
Website: http:/ / www. csstrashman. com/