Input and output file formats supported by GroupDocs.Assembly for Node.js via Java: Word, Excel, PowerPoint, email, OpenDocument, PDF, HTML, Markdown and more....RTF, ODT, OTT) Spreadsheet (XLS, XLT, XLSX, XLSM, XLTX, XLTM...Supported Supported Spreadsheet (XLS, XLT, XLSX, XLSM, XLTX, XLTM...