Question

Extension of an excel worksheet

Answer 1

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.

Answer 2

Extension of an excel worksheet are as follows:-

Legacy filename extensions denote binary Microsoft Excel formats that became outdated with the release of Microsoft Office 2007.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[1]

.xlw – Excel work space; previously known as "workbook"

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