The following document types are supported for merging into a single PDF file: PDF, DOC, DOCX, XLS, XSLX, ODF, ODT, ODS, RTF, PPT, PPTX, CSV, TXT, PNG, JPG, BMP and SVG. Upload the files (you can select multiple files at once by holding Shift or Ctrl) and wait for the operation to complete.

[Compress PDF] [Convert to PDF] [Merge to PDF] [Split PDF]