How to check for duplicate CSS rules?

Question

I messed up my css and somehow i have a lot of the duplicate rules and my 1800 something lines css file is now of 3000+ lines..

Is there any way/tool that would take

Answer 1

Have you tried CSS Lint? Click the arrow by the Lint! button and it'll open up some options you can play with. Make sure "Disallow duplicate properties" is checked