Is there an advanced CSS minifier/compiler that does things like strip redundancy and comma separate identical rules?

Question

For example

input{margin:0}body{margin:0;background:white}

would be shorter written like this

input,body{margin:0}body{back         


        

Answer 1

CSSO is little bit outdated, ACCSS is a port CSSO to but fixes open issues of the original code.

https://github.com/acwtools/accss

and it also has a better compression ratio