What does the .docx file extension indicate?

The .docx file extension indicates that the file is a Microsoft Word document, specifically in the format introduced with Microsoft Word 2007. This format is based on XML and offers advantages such as smaller file sizes and better data recovery capabilities compared to the older .doc format. The use of .docx allows for compatibility with various Word features and enhancements that have been developed since 2007.

This file type is widely used for word processing tasks, where users create, edit, and share text documents, making it an essential part of many office and educational environments. Understanding this file extension is important for recognizing how documents may be formatted and what software is suitable for opening them.