How to convert word documents to html page in sharepoint online 2013

Hi,

I am new SharePoint and still learning it.

I have been tasked to do the following on office 365 E3 SharePoint 2013 Online edition.

1) I have to create a Web page in asp.net
2) This page needs to show document from a given SharePoint folder and bind them in a grid or dropdown on the asp .net web page
3) On selecting the document from the drop down or gird (on asp .net webpage), I need to show the SharePoint word document as HTML on the webpage (something like word to html) Note: These SharePoint word document may contain Images, bullets, tables etc. 

What I have been able to do till now
1) I have been able to connect to SharePoint from ASP .net application.
2) I have been able to retrieve document from a specific SharePoint folder.
3) Read the document from SharePoint folder and bind them to a drop down on the asp .net page.

What is missing?
I am not aware about any API that SharePoint Online provides to convert Word document to HTML. Any code sample or reference on how to will be much appreciated. 

I am not also not sure what is the best way of achieving the functionality this?

Thanks 
Krishna