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.... JSON, and other formatted files to CSV, TSV, and TXT. Saving...Excel or OpenOffice spreadsheet file (e.g., XLS, XLSX, XLSM, XLSB...