Using chm2web(chm to html converter) 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.
What is the CHM?
Microsoft Compiled HTML Help is a proprietary format for online help files. It was first introduced with the release of Windows 98, and is still supported and distributed through Windows XP and Vista platforms.
.chm files are sometimes used for e-books. Most users find the format inconvenient because of its limited compatibility and the extreme difficulty of converting it to any other format without the use of expensive proprietary programs.