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.... Png ; // Save the PDF file workbook . Save ( MapPath ( "~"...pdfSaveOptions ); // Save the XLSX file workbook . Save ( MapPath ( "~"...