List of Microsoft Office filename extensions


The following is a list of Microsoft Office filename extensions, used in Microsoft Office software suite as of January 2017.

Word">Microsoft Word">Word

;Legacy: Legacy filename extensions denote binary Microsoft Word formatting that became outdated with the release of Microsoft Office 2007.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. Legacy filename extensions include:
;OOXML: Office Open XML format was introduced with Microsoft Office 2007 and became the default format of Microsoft Word ever since. Pertaining file extensions include:
;Legacy: Legacy filename extensions denote binary Microsoft Excel formats that became outdated with the release of Microsoft Office 2007. Although the latest version of Microsoft Excel can still open them, they are no longer developed. Legacy filename extensions include:
;OOXML: Office Open XML format was introduced with Microsoft Office 2007 and became the default format of Microsoft Excel ever since. Excel-related file extensions of this format include:
;Other formats: Microsoft Excel uses dedicated file format that are not part of OOXML and use the following extensions:
Legacy
OOXML
2007 introduced new file extensions:

Publisher">Microsoft Publisher">Publisher

XPS Document