Excel File Extensions Explained: XLSX vs XLSB vs XLSM
What exactly are file extensions, and why does Excel have so many of them? Just like a last name identifies which family a person belongs to, a file extension tells your computer exactly how to handle your data.
In this tutorial from Excel In Excel, we break down the critical differences between .xlsx, .xlsm, .xlsb, and the legacy .xls format. Learn exactly which format to choose to keep your workbooks safe from viruses, enable macros, or instantly reduce massive file sizes!