It can be used on any HTML file and creates a new HTML file as output. In the input file, you may use an extended syntax based on HTML, which allows for things like macros, conditionals, variables, expressions etc.

It is mainly intended for creating and maintaining larger HTML projects. As a commandline tool, it can be used together with `make', and a dependency generator is included.

Hsc is not a tool to make HTML easier for beginners; it's a tool to make HTML a bit less painful and brain-damaged for people who already know how to work with it.