Convert XLSB To SPREADSHEETML Online for Free. Free Online XLSB To SPREADSHEETML Converter. C# XLSB To SPREADSHEETML. XLSB To SPREADSHEETML via C#....images, PDF, HTML, ODS, CSV, SVG, JSON, WORD, PPT and more, thus...Paper Specifications) XLSB TO JSON (JavaScript Object Notation)...