How to Convert Docx to Doc

.docx is the extension for Microsoft Word 2013 documents. In fact, the .docx extension was first introduced when Word 2007 was released, so Word 2007, Word 2010 and Word 2013 use it. The .doc extension, on the other hand, is used by versions of Word that came before 2007. Every new release of Word brings us new features that don’t exist in the last version. This means that .docx documents may contain features not supported by versions of Word prior to 2007.