We have found 7 software records in our database eligible for .xlsx to .xlsm file format conversion.
The most convenient way how to achieve xlsx to xlsm conversion would be to simply re-save the XLSX workbook to XLSM format in Microsoft Excel. The new format will support macros and have them enabled.
The very same might be achieved in any spreadsheet program with support for modern Excel formats.
XLSX
Files with xlsx extension are s used by Microsoft Excel for its workbooks (spreadsheets) in Office Open XML format. XLSX is the latest spreadsheet format used by Excel with the adoption of XML formatting first used in Office 2007. While older xls files were in proprietary binary file format, xlsx spreadsheets use a somewhat altered XML scheme.
XLSM
Files with xlsm extension are used for workbooks of spreadsheets created in Microsoft Excel that also include macros, that enhance the functionality of the spreadsheet but some automation features. Other spreadsheets might open xlsm files as well, however they most likely wont be able to use the Excel specific formatting and macros.