List of Microsoft Office filename extensions - wikipedia List of Microsoft Office filename extensions The following is a list of Microsoft Office filename extensions, used in Microsoft Office software suite as of January 2017. Word Legacy Legacy filename extensions denote binary Microsoft Word formating that became outdated with the release of Microsoft Office 2007. Although the latest version of Microsoft Word can still open them, they are no longer developed. Legacy filename extensions include :. doc -- Legacy Word document ; Microsoft Office refers to them as `` Microsoft Word 97 - 2003 Document ''. dot -- Legacy Word templates ; officially designated `` Microsoft Word 97 - 2003 Template ''. wbk - Legacy Word document backup ; referred as `` Microsoft Word Backup Document '' OOXML Office Open XML ( OOXML ) format was introduced with Microsoft Office 2007 and became the default format of Microsoft Word ever since. Pertaining file extensions include :. docx -- Word document. docm -- Word macro-enabled document ; same as docx, but may contain macros and scripts. dotx -- Word template. dotm -- Word macro-enabled template ; same as dotx, but may contain macros and scripts. docb -- Word binary document introduced in Microsoft Office 2007 Excel Legacy Legacy filename extensions denote binary Microsoft Excel formats that became oudated with the release of Microsoft Office 2007. Although the latest version of Microsoft Excel can still open them, they are no longer developed. Legacy filename extensions include :. xls -- Legacy Excel worksheets ; officially designated `` Microsoft Excel 97 - 2003 Worksheet ''. xlt -- Legacy Excel templates ; officially designated `` Microsoft Excel 97 - 2003 Template ''. xlm -- Legacy Excel macro OOXML Office Open XML ( OOXML ) format was introduced with Microsoft Office 2007 and became the default format of Microsoft Excel ever since. Excel - related file extensions of this format include :. xlsx -- Excel workbook. xlsm -- Excel macro-enabled workbook ; same as xlsx but may contain macros and scripts. xltx -- Excel template. xltm -- Excel macro-enabled template ; same as xltx but may contain macros and scripts Other formats Microsoft Excel uses dedicated file format that are not part of OOXML and use the following extensions :. xlsb -- Excel binary worksheet ( BIFF12 ). xla -- Excel add - in or macro. xlam -- Excel add - in. xll -- Excel XLL add - in ; a form of DLL - based add - in. xlw -- Excel work space ; previously known as `` workbook '' PowerPoint Legacy. ppt -- Legacy PowerPoint presentation. pot -- Legacy PowerPoint template. pps -- Legacy PowerPoint slideshow OOXML. pptx -- PowerPoint presentation. pptm -- PowerPoint macro-enabled presentation. potx -- PowerPoint template. potm -- PowerPoint macro-enabled template. ppam -- PowerPoint add - in. ppsx -- PowerPoint slideshow. ppsm -- PowerPoint macro-enabled slideshow. sldx -- PowerPoint slide. sldm -- PowerPoint macro-enabled slide Access For a more extensive list of extensions, see Microsoft_Access § File_extensions. Microsoft Access 2007 introduced new file extensions : ACCDB -- The file extension for the new Office Access 2007 file format. This takes the place of the MDB file extension. ACCDE -- The file extension for Office Access 2007 files that are in `` execute only '' mode. ACCDE files have all Visual Basic for Applications ( VBA ) source code hidden. A user of an ACCDE file can only execute VBA code, but not view or modify it. ACCDE takes the place of the MDE file extension. ACCDT -- The file extension for Access Database Templates. ACCDR -- is a new file extension that enables you to open a database in runtime mode. By simply changing a database 's file extension from. accdb to. accdr, you can create a `` locked - down '' version of your Office Access database. You can change the file extension back to. accdb to restore full functionality. Other Publisher ( edit ). pub - a Microsoft Publisher publication XPS Document. xps - a XML - based document format used for printing ( on Windows Vista and later ) and preserving documents. See also Microsoft Office Microsoft Office XML formats Filename extension Alphabetical list of file extensions Office Open XML External links Introducing the Microsoft Office ( 2007 ) Open XML File Formats Introduction to new file - name extensions References Jump up ^ `` Excel 2007 XLL Software Development Kit Documentation ''. MSDN. Microsoft. Retrieved 4 June 2013. Microsoft Office History Office suites Windows 3.0 95 97 2000 XP 2003 2007 2013 2016 2019 Mac 98 X 2008 2011 2016 Others Office 365 Office Mobile Applications ( List ) Desktop Access Excel OneNote Outlook PowerPoint Project Publisher Skype for Business Teams Visio Word Server Skype for Business Server SharePoint Excel Services Project Server Search Server Mobile Outlook Groups Outlook Mobile Lens Remote Web Bookings Calendar Delve Forms People Office Online OneDrive Outlook.com Outlook on the web Planner Sway Tasks Teams Video Office tools Shared tools Ribbon Hero Ribbon Hero 2 Discontinued Discontinued shared tools Accounting Docs.com Entourage FrontPage InfoPath InterConnect Liquid Motion Lync Live Meeting Mail Classroom Office Assistant Office Live OneDrive Groups PerformancePoint Server Picture Manager PhotoDraw Photo Editor Project Portfolio Server Schedule+ SharePoint Designer SharePoint Workspace Snapshot Viewer for Access Vizact Word Viewer Technologies Information Bridge Framework Object Linking and Embedding Office Open XML Office XML formats Smart tags Visual Basic for Applications Other topics Microsoft Product Activation Office Genuine Advantage Office filename extensions Microsoft Office password protection Commons Book Wikiversity Retrieved from `` https://en.wikipedia.org/w/index.php?title=List_of_Microsoft_Office_filename_extensions&oldid=820727767 '' Categories : Lists of file formats Microsoft Office Office Open XML Filename extensions Talk About Wikipedia Nederlands Edit links This page was last edited on 16 January 2018, at 07 : 49. 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Question: what is default extension of file in excel 2010
Answer: .xlsx