Input and output file formats supported by GroupDocs.Assembly for Node.js via Java: Word, Excel, PowerPoint, email, OpenDocument, PDF, HTML, Markdown and more....SpreadsheetML, ODS) Presentation (PPT, PPTX, PPTM, PPS, PPSX, PPSM, POT...Supported Presentation (PPT, PPTX, PPTM, PPS, PPSX, PPSM, POT...