EasyXLS is an Excel library that makes possible exporting data in XLSB file format programmatically. It can be integrated in programming languages like:

.NET languages
C#, VB.NET, C++.NET, J#

Languages that support COM objects
PHP, ASP classic, C++, VBS, VB6

Java or languages that support Java integration
Java, ColdFusion

Why choose XLSB and not XLSX file format
The XLSB file is an Excel binary format. The XLSX file is a zipped structure of files in XML format. Being a binary file, the XLSB file is oriented on performance and it is recommended to use the XLSB file format for exporting large data to Excel. The size of the exported file is smaller and the exported time is reduced. Besides, on the client side, opening and manipulating data in XLSB file format will be faster.

The XLSB file format is not so easy to decode as the XLSX file format. The XLSX file can be easily unpacked and check inside the XML files with any text viewer. The XLSB file format is much more complicated to be decoded.

How to export data to XLSB file format
EasyXLS library makes this task very easy to archive. See the technical documentation on how to export data to XLSB file format.