Convert Excel XLSB to XLSX in C#, VB.NET, Java, PHP, ASP classic, C++, C++.NET, VB6, VBS! XLS, XLSX, XLSM, XLSB spreadsheets by EasyXLS.
https://www.easyxls.com/manual/basics/convert-xlsb-to-xlsx.html
Convert Excel XLSX to XLSB in C#, VB.NET, Java, PHP, ASP classic, C++, C++.NET, VB6, VBS! XLS, XLSX, XLSM, XLSB spreadsheets by EasyXLS.
https://www.easyxls.com/manual/basics/convert-xlsx-to-xlsb.html
Convert Excel XLSX to XLS in C#, VB.NET, Java, PHP, ASP classic, C++, C++.NET, VB6, VBS! XLS, XLSX, XLSM, XLSB spreadsheets by EasyXLS.
https://www.easyxls.com/manual/basics/convert-xlsx-to-xls.html
Convert Excel XLS to XLSB in C#, VB.NET, Java, PHP, ASP classic, C++, C++.NET, VB6, VBS! XLS, XLSX, XLSM, XLSB spreadsheets by EasyXLS.
https://www.easyxls.com/manual/basics/convert-xls-to-xlsb.html