The best replacement for xlsm is xlsx.

The best alternatives to xlsm are rated as following:
★★★★★  xlsx
★★★★  xls
★★  xlsb
★★  xltm
★  xlam

Your alternative for xlsm is not listed? Suggest!


No companions for xlsm have been suggested so far.
You have in mind a companion for xlsm and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of xlsm in all years. Click on graph for more.
xlsm
xlsx
xls