Convert XLSB to XLSX

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If you have access to MS Excel, you can easily resave .xlsb files to .xlsx files with just the File ► Save as.. function found in the program. Some 3rd party alternatives also support Excel formats, albeit some formatting might be lost during the xlsb to xlsx conversion process.  The main difference between the formats is that XLSB binary files are loaded much faster in Excel, unfortunately the format is not well-supported in other programs.

Open XLSB file    Open XLSX file