Microsoft Office 2007 introduced the Office Open XML file formats, which became the default file format for Word, Excel, and PowerPoint. These new file formats were designed to be more efficient, more secure, and more interoperable than the previous binary file formats used by earlier versions of Microsoft Office.

In addition to the new file formats, Office 2007 also introduced support for exporting documents to PDF and XPS formats, making it easier to share documents with others who might not have Microsoft Office installed. Office 2007 also included support for the OpenDocument Format (ODF), which is used by some open-source office suites like OpenOffice and LibreOffice.

Office 2007 apps (Word, Excel, PowerPoint, Outlook, Publisher, Access, InfoPath, Communicator, Groove, OneNote, Project, and SharePoint Designer) with the adoption of the new file formats (Office Open XML), PDF, XPS and support for OpenOffice document file format (ODF).