+Excel 2007 formatsFormatExtensionDescriptionExcel WorkbookThe default Excel 2007 and later workbook format. In reality, a ZIP compressed archive with a directory structure of XML text documents. Functions as the primary replacement for the former binary .xls format, although it does not support Excel macros for security reasons. Saving as .xlsx offers file size reduction over .xlsExcel Macro-enabled WorkbookAs Excel Workbook, but with macro support.Excel Binary WorkbookAs Excel Macro-enabled Workbook, but storing information in binary form rather than XML documents for opening and saving documents more quickly and efficiently. Intended especially for very large documents with tens of thousands of rows, and/or several hundreds of columns. This format is very useful for shrinking large Excel files as is often the case when doing data analysis.Excel Macro-enabled TemplateA template document that forms a basis for actual workbooks, with macro support. The replacement for the old .xlt format.Excel Add-inExcel add-in to add extra functionality and tools. Inherent macro support because of the file purpose.
+eXcEl 2007 ForMatSFormatexTeNsIondescRipTIoNexcel workbOOktHe defAult exceL 2007 aNd later WorkbOoK fOrMaT. In ReALIty, A zIp CoMpreSsEd ARCHive wIth A DirecTory sTRucTuRE of xml TExt docuMents. fuNCtiOns as thE PrImary REPlacemenT FoR thE fOrmer biNary .xlS format, aLThOugH it dOeS Not sUppOrt ExCel MaCRos FOr seCuRitY ReasONS. savinG aS .xlSx oFfers file size rEducTion oveR .xLsexceL maCrO-ENabled WOrkbookaS ExCEl woRKbook, but with MAcRO SupporT.eXCEl BINary woRkBoOkaS exceL maCro-enaBLed woRkBOoK, BUT StoRing informatioN IN BiNAry form Rather tHan xMl docUMents for openiNG aNd SAVIng documEnts morE quickly aNd efficiEntLy. intEnDed eSpeCIAlly FoR Very lArGe Documents with tens Of Thousands OF rows, aND/or sEverAl hunDrEds of coLumNS. This fOrMat is very USeful foR shRiNKIng LargE excel fILES as .is Often the caSe WhEn DoInG Data anaLysIs.eXcel mAcRo-enableD TemPLatea tEmplate dOcuMeNt THat FormS a basIs for actUaL worKbookS, wiTh mAcro suppoRt. THe REPlAcemeNt for the old .xLT forMat.excEl add-iNExcel add-in tO aDd eXTRa FuNCtioNaLiTy and tOOLs. inherent MacRo sUpPort BeCauSe of the fIle pUrpose