16 Dec 2025 — Microsoft Word currently uses the . docx extension for document files, but older versions of the program used the extension . doc.
How to convert DOCX Word files back to .doc files - Microsoft Q&A convert docx to doc
: Certain academic institutions require submissions in .doc to ensure all reviewers, regardless of their software version, see the same layout. Method 1: Using Microsoft Word (Recommended) 16 Dec 2025 — Microsoft Word currently uses the