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