To minify/compress your CSS perform a POST request to https://www.toptal.com/developers/cssminifier/raw with the
input parameter set to the CSS you want to minify.
wget --post-data='input=p { color : red; }' --output-document=- https://www.toptal.com/developers/cssminifier/raw
wget --post-data="input=`cat style.css`" --output-document=style.min.css https://www.toptal.com/developers/cssminifier/raw
curl -X POST -s --data-urlencode 'input=p { color : red; }' https://www.toptal.com/developers/cssminifier/raw
curl -X POST -s --data-urlencode 'input@style.css' https://www.toptal.com/developers/cssminifier/raw > style.min.css
POST https://www.toptal.com/developers/cssminifier/raw?input=...
To see implementations in other languages see the other Language Examples pages below.
Click on the language of your choice to see an example: