ExtraCHM is a free, full-featured, modern, multi-tabbed eBook reader that allows you to view Compiled HTML (chm) under Windows XP/Vista/7. ExtraCHM offers handy tools for navigation, search, and eBook reading. With ExtraChm you may view documents in a modern multi-tabbed interface, bookmark pages and text selections, improve readability by changing the size of the text even for fixed size texts, decompile chm file and convert chm to html.