Microsoft Word Files Are Called

Microsoft Word files are called Word documents, or simply documents. The usual file extension is .docx, while older Word documents often use .doc. Word also has separate formats for templates and documents containing macros. The extension identifies the file format; the name before it describes.

What a Word document contains

A Word document can hold text, images, tables, headings, page numbers and other elements used in letters, reports, essays and business documents. Its file format stores both the content and information about how that content should appear.

In the filename Project Proposal.docx, “Project Proposal” is the name chosen by the author and “.docx” is the extension. Calling it a Word document describes the kind of file. Calling it a DOCX file identifies its particular format.

The distinction matters because Word can save several formats. A file created in Word is not necessarily a .docx file: it might be an older .doc document, a reusable template or an exported PDF.

Common Word file extensions and when to use them

Choose the format according to whether you need an ordinary document, a reusable starting point or a file that preserves macros.

DOCX and DOC are different formats

The .docx format was introduced with Word 2007. It uses Office Open XML, with document content and related data stored in a compressed package. The older .doc format stores document data in a binary format.

Use .docx for an ordinary document unless the recipient or your workflow requires something else. When converting to .doc, check the result: features and formatting supported by the newer format may change or be lost.

Templates and macros need their own extensions

A template provides a starting point for repeated work, such as a letterhead, meeting agenda or report. Use .dotx for a template without macros and .dotm when the template needs to retain them.

Macros automate tasks in Word. A .docx file cannot store VBA macros; a document that needs to preserve them uses .docm. If you change a macro-enabled document to .docx, Word cannot retain its VBA macros in that format.

How to save a document in the right format

Use Word’s saving options to change formats. Replacing the letters at the end of a filename does not convert the file’s contents.

1. Open the document in Word.
2. Choose Save As or Save a Copy, depending on the Word interface you are using.
3. Select a folder and enter a descriptive filename.
4. Choose the required file type, such as Word Document (.docx).
5. Save the file and review any compatibility or feature-loss warning before continuing.
6. Open the saved copy and check its layout, tables and other important content.

Keep the original when converting an older document or a file containing macros. This gives you a reference if the converted copy behaves differently.

Opening and sharing Word files

Word documents can be opened in Microsoft Word and compatible word processors. Support for the extension does not guarantee that every feature will look or behave identically in another application. Review complex layouts, fonts and tracked changes after opening a file elsewhere.

Ask whether the recipient needs to edit the document or only read it. Send .docx when they need an editable Word file. Export a PDF when the main aim is to share a fixed page layout, and check the exported pages before sending them. A PDF does not inherently prevent editing.

Other export formats serve narrower purposes. Plain text removes formatting, while RTF can retain some formatting for compatible software. Keep a Word copy if you expect to revise the original document later.

Naming Word documents so they are easy to find

A useful filename tells you what the document contains without opening it. Include a project, subject or document type, then add a date or version when it helps distinguish related files.

• Project Proposal.docx identifies the document’s purpose.
• Meeting Minutes_YYYY-MM-DD.docx shows a consistent pattern for dated records.
• User Manual_v2.docx distinguishes a revised copy.

Use a consistent naming pattern across shared folders. Avoid ambiguous names such as Document1 or repeated “final” labels, and leave the extension intact when renaming files.

When the problem is Office access

Identifying a Word file’s format is separate from activating the Office application. If Word displays a licence or activation message, use the relevant guidance on activating Microsoft Office using Command Prompt. For a product-key question, consult the guide to finding a Microsoft Office product key using Command Prompt. Further application help is available in the Microsoft Office guides.

Check the extension of the document you are working on, then save a .docx copy if you need a standard editable Word document.