PDF2Word Compatibility with Word 2003 and Earlier

PDF2Word is programmed to write (.docx) files, which is compatible with Word 2007 and later but, once converted, you can then save the file to a (.doc) format which would work for Word 97-2003.

You can visit this article from Microsoft Office Support to better help you with saving a document that can be opened in an earlier version of Word:

https://support.office.com/en-us/article/Save-a-document-in-Word