GroupDocs.Merger Cloud is a REST API that allows you to join multiple documents and manipulate single document structure across a wide range of document formats. Below, the shortlist of possible actions:
Document operations Join Documents This feature lets you merge two or more documents into one document, join specific pages or page ranges from several source documents into a single resultant document. Joined documents should be of the same format.... Rotate Pages The RotatePages operation lets you rotate pages...document. You can rotate pages by setting rotation angle to 90,180...