For a standard Excel document, prior to Excel 2007, it is xls and xlsx is used in 2007. There are other kinds of files created by Excel, like templates which can be xlt or macros which can be xlm and xla for Add-ins, and there are other extenions. For 2007, you add x to the end of them.
The default file extension is .xls for all the MS Excel versions up-to 2003.
And .xlsx for all the MS Excel versions from 2007.
Excel saves files using a .xls extension (Excel 2003 and earlier) or .xlsx extenstion (Excel 2007 and later).
.xl is the file extension for Excel documents.
Default file extension for MS Excel 2003 & earlier versions is .xls
Default file extension for MS Excel 2007 & later versions is .xlsx
The file extension of MS Excel is .xmls
The extension for excel is .xls
the normal extension for Excel is xls if pre 2007 otherwise xlsx
This file type does not exists. It is xlsx (Microsoft Excel) file with wrong file extension.
To indicate that the basic file format is XML in Excel 2007 and later.
xlsx is the main extension used for Excel 2007.
XLS is the shorthand for Microsoft Excel file extension. A file extension is the group of letters following a period in a file name, denoting what kind of file it is.
".doc" in versions of Microsoft Word before 2007".docx" in Microsoft Word 2007 and later..docMS word
It is a collection of worksheets and known as a workbook, and has a .xls extension.
XLS is the most common extension for Microsoft Excel spreadsheets. It is an acronym that actually stands for "MS File Extension". There is also XLSX and XLSM.
For workbooks in Excel 2003, the extension .xls is used.
MS Excel does not have a web extenstion. The file extenstion is .xls or .xlsx. If you convert a worksheet to HTML, then the extensiton will be .htm or .html.