Class Libraries & REST APIs for the developers To manipulate & process Files from Word, Excel, PowerPoint, Visio, PDF, CAD & several other categories in Web, DeskTop or Mobile apps. Develop & deploy on Windows, Linux, MacOS & Android platforms....spreadsheet formats ( XLS , XLSX , XLSB ) and other popular formats...formats such as ODS , Json , Markdown , Png , Pptx , CSV , TXT ...