Convert output to Word Document editor

Hi, I have this use case: I have multiple form which using RichTextEditor for input field and word document template file. I need to fill the input user type in those RichTextEditor to the word document template. I have research and found the only way to insert rich text input into word file is by insert data with SDFT format, but to do that I need to convert each input field value to SDFT which is not performance because there alot of field and I need to do that on the server. So is there anyway to convert output from RichTextEditor to SDFT in the client side after user submit 


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