Binary package “archmage” in ubuntu focal

CHM (Compiled HTML) Decompressor

 arCHMage is a reader and decompiler for files in the CHM format. This is the
 format used by Microsoft HTML Help, and is also known as Compiled HTML.
 .
 arCHMage provides the following features:
  - Extracting CHM content to set of HTML, CSS files and images
  - Dumping HTML data from CHM as a plain text