Microsoft Office file extensions list

Browse file extensions by file type category:

Microsoft Office file type extensions
(98 file extension database entries)

List of file types used by various applications from Microsoft Office productivity suite and Office 365 apps

Microsoft Office file extension list

List of file types used by various applications from Microsoft Office productivity suite and Office 365 apps.

This category of file extensions contains file types from the Microsoft Office productivity suite and its individual programs. The latest edition, Office 2016, is available for Windows and OS X in several editions that offer various combinations of productivity software and also as a subscription based platform - Office 365. The latest editions of Office offers the following programs:

Word (all editions)
Excel (all editions)
PowerPoint (all editions)
OneNote (all editions)
Outlook (Home and Business and higher)
Publisher (Professional and higher; Windows only)
Access (Professional and higher; Windows only)
Skype for Business (Professional Plus and higher; Windows only)
Additionally, there are two programs from the Office suite that are not part of any of the suites at this time, namely Visio and Project. These two can be only obtained as part of Office 365 subscription.

Over the years, users became familiar with most of the common Microsoft Office file extensions, with .doc, .xls, and .ppt files being probably the three most known. With the release of Office 2007, Microsoft was trying to leave those well-known extensions in the past and replace them with the new XML-based formats that have a 4-letter file extensions, with "x" being appended to the original extension, so for example .doc became .docx, .xls -> .xlsx, .ppt -> .pptx etc. The key difference is that the original files were saved in binary form and the new ones are XML-based. These new formats are still being used in the latest 2016 edition of Microsoft Office, but the older formats are still supported and can be opened in their respective programs.

Another change introduced in the 2007 Office release was that there are different extensions for files that have macros enabled and those that do not. Macro-enabled documents include a file name extension that ends with the letter "m" instead of an "x". For example a macro-enabled Word 2007 document has the .docm extension and thereby allows any user or software to recognize documents that allow additional code (macro).

Sort by: Extension	Sort by: File type description
file extension accda	Microsoft Access add-in
file extension accdb	Microsoft Access main database
file extension accdc	Microsoft Access digitally signed database
file extension accde	Microsoft Access compiled execute only database
file extension accdp	Microsoft Access project
file extension accdr	Microsoft Access runtime mode database
file extension accdt	Microsoft Access database template
file extension accdu	Microsoft Access database wizard file
file extension acl	Microsoft Office automatic correction list
file extension ade	Microsoft Access compiled project
file extension asd	Microsoft Word auto-save document
file extension cnv	Microsoft Word text conversion file
file extension crtx	Microsoft Office chart template
file extension doc	Microsoft Word document (prior version 2007)
file extension docm	Microsoft Word Open XML macro-enabled document
file extension docx	Microsoft Word Open XML document
file extension dot	Microsoft Word document template (up to Microsoft Word 2003 version)
file extension dotm	Microsoft Word Open XML macro-enabled document template
file extension dotx	Microsoft Word XML document template
file extension grv	Microsoft SharePoint WorkSpace Groove data
file extension h1q	Microsoft Help merged query index
file extension iaf	Microsoft Outlook exported account and email setting
file extension laccdb	Microsoft Access database lock
file extension maf	Microsoft Access form shortcut file
file extension mam	Microsoft Access macro shortcut file
file extension maq	Microsoft Access query shortcut file
file extension mar	Microsoft Access report shortcut
file extension mat	Microsoft Access table shortcut file
file extension maw	Microsoft Access data access page file
file extension mda	Microsoft Access add-in
file extension mdb	Microsoft Access database
file extension mde	Microsoft Access compiled database (application)
file extension mdt	Microsoft Access database template
file extension mdw	Microsoft Access workgroup information
file extension mpd	Microsoft Project database
file extension mpp	Microsoft Project plan
file extension mpt	Microsoft Project template
file extension mso	Microsoft Organization Chart chart data
file extension oab	Microsoft Outlook offline address book
file extension obi	RSS subscription file from Microsoft Outlook 2007 and above versions
file extension oft	Microsoft Outlook template
file extension olm	Outlook for Mac e-mail database
file extension one	Microsoft OneNote document
file extension onepkg	Microsoft OneNote package
file extension ops	Microsoft Office profile settings
file extension ost	Microsoft Outlook inbox off-line folder
file extension pa	Microsoft PowerPoint add-in
file extension pip	Microsoft Office personalized settings
file extension pot	Microsoft PowerPoint 97 to 2003 template
file extension potm	Microsoft PowerPoint macro-enabled Open XML template
file extension potx	Microsoft PowerPoint Open XML presentation template
file extension ppa	Microsoft PowerPoint 97 to 2003 add-in
file extension ppam	Microsoft PowerPoint macro-enabled Open XML add-in
file extension pps	Microsoft PowerPoint 97 to 2003 complete slide show
file extension ppsm	Microsoft PowerPoint macro-enabled Open XML complete slide show
file extension ppsx	Microsoft PowerPoint Open XML complete slide show
file extension ppt	Microsoft PowerPoint 97 to 2003 presentation
file extension pptm	Microsoft PowerPoint macro-enabled Open XML presentation
file extension pptx	Microsoft PowerPoint Open XML presentation
file extension prf	Microsoft Outlook profile file
file extension pst	Microsoft Outlook personal storage table
file extension pub	Microsoft Publisher document
file extension puz	Microsoft Publisher packed document
file extension rpmsg	Microsoft Restricted Permission Message
file extension sldm	Microsoft PowerPoint macro-enabled Open XML slide
file extension sldx	Microsoft PowerPoint Open XML slide
file extension slk	Microsoft Symbolic Link format
file extension snp	Microsoft Access report shapshot
file extension svd	Microsoft Word document autosave file
file extension thmx	Microsoft Office theme
file extension vdx	Microsoft Visio drawing XML file
file extension vsd	Microsoft Visio diagram document
file extension vsdx	Microsoft Visio drawing
file extension vss	Microsoft Visio smartshapes data
file extension vst	Microsoft Visio flowchart
file extension vsx	Microsoft Visio stencil XML file
file extension vtx	Microsoft Visio XML template file
file extension wbk	Microsoft Word document save backup
file extension wll	Microsoft Word add-in
file extension xar	Microsoft Excel AutoRecover backup
file extension xl	Microsoft Excel spreadsheet
file extension xla	Microsoft Excel add-in
file extension xlam	Microsoft Excel Open XML macro-enabled add-in
file extension xlb	Microsoft Excel toolbars settings
file extension xlc	Microsoft Excel chart
file extension xll	Microsoft Excel add-in file
file extension xlm	Microsoft Excel macro
file extension xls	Microsoft Excel 97 to 2003 workbook
file extension xlsb	Microsoft Excel binary workbook file
file extension xlsm	Microsoft Excel Open XML macro-enabled workbook
file extension xlsx	Microsoft Excel Open XML workbook and spreadsheet
file extension xlt	Microsoft Excel 97 to 2003 workbook template
file extension xltm	Microsoft Excel Open XML macro-enabled workbook template
file extension xltx	Microsoft Excel Open XML workbook template
file extension xlw	Microsoft Excel workspace
file extension xsf	Microsoft Office InfoPath form definition
file extension xslb	Microsoft Excel data
file extension xsn	Microsoft Office InfoPath template form

Microsoft Office file extensions

Browse file extensions by file type category:

Microsoft Office file extension list

List of file types used by various applications from Microsoft Office productivity suite and Office 365 apps.

Browse by extension type: