Link CSSStyle

CSStyle is an easy-to-use CSS converter for browsers using Gecko, Presto, Trident or Webkit engines. It converts CSS values which are experimental in those engines. It is mainly used for CSS3 new features.

From:

div {
   border-radius: 1em;
   transition-duration: 1s;
}

To:

div {
   border-radius: 1em;
   -webkit-border-top-left-radius: 1em;
   -webkit-border-top-right-radius: 1em;
   -webkit-border-bottom-right-radius: 1em;
   -webkit-border-bottom-left-radius: 1em;
   transition-duration: 1s;
   -moz-transition-duration: 1s;
   -webkit-transition-duration: 1s;
}

CSStyle is a very light project with no software dependencies and no configuration. It can be used as a Python library or as an executable.