Hi Manikandan,
Thank you for your interest in Syncfusion products.
You can download the Essential Studio setup from the following link.
http://www.syncfusion.com/support/forums/general/108998/Essential-Studio-2013-Volume-2-Final-Release-v112025-available-for-download-
You need the following list of dll's for the conversion process
1)Sycfusion.DocIO.Base.dll
2)Syncfusion.Core.dll
3)Syncfusion.Compression.Base.dll
Please find the sample to convert word document to html & Html to Word document from the below link.
http://www.syncfusion.com/downloads/support/directtrac/general/Doc%20To%20HTML-1969989212.zip
http://www.syncfusion.com/downloads/support/directtrac/general/HTML%20To%20Doc-1067166154.zip
The following is the UG link for your referrence
http://help.syncfusion.com/ug/wpf/docio/default.htm#!documents/doctohtml.htm
http://help.syncfusion.com/ug/wpf/docio/default.htm#!documents/importingxhtml.htm
Please let us know if you have any queries.
Regards,
Sathish