Merge SPREADSHEETML to PPTX Online for Free. Free Online SPREADSHEETML to PPTX Merger. Merge SPREADSHEETML to Word, Excel, PPTX, PDF, JPG, HTML, ODS, SVG, XPS and more.... Upload your files, call Workbook.Combine method for merging...import Workbook workbook = Workbook( "Input.xlsx" ) workbook.combine(Workbook(...