A CSS minifier which not only aims at reducing the amount of bytes of the output, but also at improving gzip compression. It may be used as a library, or a stand-alone executable. For the library, refer to the Hasmin module documentation. For the program: the output is the minified CSS file, but hasmin allows also its compression into gzip using Google's Zopfli library. To use it: ./hasmin input.css > output.css By default, most minification techniques are enabled. For a list of available flags, do: ./hasmin --help