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....Ask AI Create New Workbook Contents [ Hide ] Aspose.Cells - Create...Workbooks can be saved in many formats NPOI - HSSF XSSF - Create New...