What is the default extension of word file in office 10?

The default extension of word files is docx.

Docx is the file extension of Microsoft Word, which is used by versions after Microsoft Office2007. It replaces the proprietary default file format based on the compressed file format of Office Open XML standard.

The letter "x" is added to the traditional file extension (i.e. Docx "replaces". doc“，”。 Xlsx replaces ".xls" and ". Pptx replaced ". ppt”)。

Any word processing software that can open a doc file can convert it into a docx file, which takes up less space than a DOC file, and a DOCX file is essentially an XML file.

Extended data

The main content of docx format file is saved in XML format, but the file is not saved directly on disk, and the response speed is better than doc.

The traditional doc format is Microsoft-specific format, and it is not fully authorized. Although other office, such as wps, Yongzhong and openoffice, can open the doc format, and most of them have no problems, there will be errors in a few places.

Because docx is a suffix in the new version of word2007, you only need to install Office 2007 and run Word 2007 to open the docx file normally.