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