|Microsoft Excel Binary Workbook|
|Internet media type||application/vnd.ms-excel.sheet.binary.macroEnabled.12|
|Type||Spreadsheet file format|
|Standard||[MS-XLSB]: Excel Binary File Format (.xlsb) Structure Specification|
|File formats category -|
A Microsoft Excel Binary Workbook is an Excel workbook that is encoded in binary, which makes it suitable for storing large amounts of data.
It may have macros; the extension doesn't disambiguate between those without macros and those with them.
- Microsoft Excel Workbook (.xlsx)