DOCX is the filename extension for Microsoft Office 2007 Word documents. DOCX files do not contain macros. The old DOC extension is being phased out by Microsoft.
.docx
.docx The extension docx is used in Word 2007.
.docx
.docx is the new primary extension for Microsoft Word documents.
.doc or .docx
.doc , .docx
.docx
"Docx" is the default file extension for Word 2013 edition.
.DOCX
extension .docx
MS Word 2007 uses a .docx extension by default.