Convert Open Document to Html and vice versa including images using Asp.net

Question

Hi , Could any one please tell me the procedure to convert open document to html page .

I have no Ms Office installed in my system and i don't want to use the Microsoft.Office.Interop.Wrod.dll in my application.

could you please say how to convert any document ( like open document, rtf
with out ms office installed in the system) to html page and vice versa

Thanking you