Conversion of xlsx files to xlsb file format

As both the .xlsx  and .xlsb files are from Microsoft Excel, which means the easiest way to achieve xlsx to xlsb conversion is to use the program. The reason for this is to create binary workbooks that are much faster to load. You can create a .xlsb workbook from existing .xlsx spreadsheet in Microsoft Excel with the File ► Save as... function.

Open XLSX file    Open XLSB file

Related software

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Apache OpenOffice Calc

Spreadsheet program from productivity suite

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LibreOffice Calc

Full-featured spreadsheet tool from LibreOffice suite

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Microsoft Excel

A popular spreadsheet application distributed with Microsoft Office suite

Microsoft Excel for Mac icon

Microsoft Excel for Mac

A popular spreadsheet application from the Microsoft Office suite