We have found one software suitable in our database for this conversion.
Saving financial, accounting, bank, credit card and other relevant data from Excel spreadsheets (.xlsm, .xls) to OFX (Open Financial Exchange format) is possible in several spreadsheets editors or conversion utilities.
Unfortunately, Excel itself does not natively support saving to OFX, which means you have to rely on some kind of xlsm to ofx conversion utility.
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.
OFX
Files with ofx extension are generally financial data files in Open Finance Exchange format. Used in many programs.