User:Matthewrb/sandbox/List of Microsoft Office filename extensions

The following is a list of filename extensions used by programs included in Microsoft 365, formerly known as the Microsoft Office suite.

The Office Open XML (OOXML) format was introduced with Microsoft Office 2007 and became the default format of Microsoft Word, PowerPoint, and Excel ever since.

<>Legacy filename extensions denote binary Microsoft Word formatting that became outdated with the release of Microsoft Office 2007. Although the latest version of Microsoft Word can still open them, they are no longer developed.