What are the new file extensions in Office 2007? - Knowledge Base

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What are the new file extensions in Office 2007?

Microsoft Office 2007 uses new XML-based file formats, which have new file type associations and extensions, as follows:

Application	Office file type	Extension	Description
Word	Word 2007 XML document	`.docx`	New default Word 2007 file format
	Word 2007 XML macro-enabled document	`.docm`	Uses same basic Word 2007 XML document format, but can store VBA macro code
	Word 2007 XML template	`.dotx`	Default format and extension for Word document templates
	Word 2007 XML macro-enabled template	`.dotm`	Format and extension for Word document templates that can support macro code. The templates do not need to contain macro code when created; that code can be embedded later.
Excel	Excel 2007 XML workbook	`.xlsx`	Default Excel 2007 file format
	Excel 2007 XML macro-enabled workbook	`.xlsm`	Uses same basic Excel 2007 XML worksheet/workbook format, but can store VBA macro code
	Excel 2007 XML template	`.xltx`	Default format and extension for Excel templates
	Excel 2007 XML macro-enabled template	`.xltm`	Format and extension for Excel worksheet templates that can support macro code. Can contain a VBAProject part or Excel 4.0 macro sheets (`.xlm` files in Excel 4.0). Workbooks created from this template inherit the VBAProject part or Excel 4.0 macro sheets that exist in the template.
	Excel 2007 binary workbook (BIFF12)	`.xlsb`	Fast load-and-save file format for those who need the fastest way possible to load a data file. Supports use of VBA projects, Excel 4.0 macro sheets, and all the new features in Excel 2007. Note: This is not an XML-based file format, so it's not the best choice for accessing and manipulating content without the use of Excel 2007.
	Excel 2007 XML macro-enabled add-in	`.xlam`	A supplemental program designed to run additional code. Excel add-ins use the new XML file format to store data. Excel XML add-ins support the use of VBA projects and Excel 4.0 macro sheets.
PowerPoint	PowerPoint 2007 XML presentation	`.pptx`	The default PowerPoint XML format. Cannot contain a VBAProject part (the part that stores VBA macro code) or Action settings.
	PowerPoint 2007 macro-enabled XML presentation	`.pptm`	Uses same basic PowerPoint 2007 XML presentation format, but can store VBA macro code
	PowerPoint 2007 XML template	`.potx`	Default file format and extension for PowerPoint templates
	PowerPoint 2007 macro-enabled XML template	`.potm`	Format and extension for PowerPoint templates which can contain VBA code. Presentations created from this template do not inherit the VBA project or Action settings.
	PowerPoint 2007 macro-enabled XML add-in	`.ppam`	An XML-based PowerPoint presentation designed to be executed as a supplemental program. All PowerPoint add-ins are macro-enabled.
	PowerPoint 2007 XML show	`.ppsx`	An XML-based PowerPoint auto-running slide show. Cannot contain a VBAProject part.
	PowerPoint 2007 macro-enabled XML show	`.ppsm`	An XML-based PowerPoint slide show file that contains a VBAProject part. Created when the auto-running slide show includes VBA macro code.

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Last modified on December 19, 2008.

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