I wonder if someone knows if there is a library that can convert .html to word document within dnn?

Shean-Shean

I'm not sure what you are trying to accomplish. Word will open an HTML file. You can also rename a .html file to a .doc file and word will open it.  Is that a conversion? 

mj

If you want to create a true word file with the document enbedded you will need to either use a custom generator class that various vendors make, or you will need to automate Word to dynamically create the document.