The standard extension of a Microsoft Word document file is .docx.

Quick Scoop: The Basics

  • Modern Word documents (Word 2007 and later) normally save as filename.docx by default.
  • Older versions of Word (Word 97–2003) used .doc as the main extension.

So if someone asks, “what is the extension of a Word file?” they almost always mean .docx today.

Other Word-Related Extensions

Word can also use several related extensions depending on what you’re doing.

  • .docx – Standard Word document (default in recent versions).
  • .doc – Legacy Word document (used by Word 97–2003).
  • .dotx – Word template file (no macros).
  • .dotm – Word template that can contain macros.
  • .docm – Word document that can contain macros.

These are all “Word files,” just used for slightly different purposes.

Mini FAQ Style View

  • Q: What is the extension of a Word file in current versions?
    A: .docx.
  • Q: What was the old Word extension?
    A: .doc.
  • Q: Are templates also Word files?
    A: Yes, they use .dotx or .dotm , but they’re still opened in Word.

Simple HTML Table Version

Type Extension Used For
Modern Word document .docx Default file type in recent Microsoft Word versions
Legacy Word document .doc Documents from Word 97–2003
Word template (no macros) .dotx Reusable layouts/styles for new documents
Word macro-enabled template .dotm Templates that can include macros
Word macro-enabled document .docm Documents that can include macros
**TL;DR:** If you just need one short answer for “what is the extension of a Word file,” use **.docx**.

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