Using chm2web you can convert documentation in the chm format (html help) into a full-featured browser-based platform-independent html help system that can be viewed in any modern web browser. The set of HTML files created by chm2web can be as well uploaded to your web server or used locally as a help system for your products.
chm2web is shareware, you can free download and try it for free during trial period. After that you may buy it for $119 or should delete it.