Merge PDFs

How to Combine PDF Files

Correctly merging PDFs means removing duplicate resources – fonts, images, metadata, content, links and annotations, for example – to keep file sizes to a minimum. Adobe PDF Library automates the process of selecting information from a variety of sources to create PDFs with customized content.

Get Free Trial

C++

Java

C++

				
					APDFLDoc doc1(csInputFileName1.c_str(), true);

        APDFLDoc doc2(csInputFileName2.c_str(), true);

        ASInt32 InsertFlags = PDInsertBookmarks | PDInsertDoNotMergeFonts | PDInsertDoNotResolveInvalidStructureParentReferences | PDInsertDoNotRemovePageInheritance;
        
		PDDocInsertPages(doc1.getPDDoc(), PDLastPage, doc2.getPDDoc(), 0, PDAllPages, InsertFlags, NULL, NULL, NULL, NULL);

		ASInt32 saveFlags = PDSaveFull | PDSaveCollectGarbage;
		
		ASInt32 saveFlags2 = PDSaveCompressed| PDSaveAddFlate; //different enums of saveFlags, don't mix.

        doc1.saveDoc(csOutputFileName.c_str(), saveFlags, saveFlags2);

				
					using (Document doc1 = new Document(sInput1))
                {
                    using (Document doc2 = new Document(sInput2))
                    {
                        try
                        {
                            doc1.InsertPages(Document.LastPage, doc2, 0, Document.AllPages, PageInsertFlags.Bookmarks |
                                             // For best performance processing large documents, set the following flags.
                                             PageInsertFlags.DoNotMergeFonts | PageInsertFlags.DoNotResolveInvalidStructureParentReferences | PageInsertFlags.DoNotRemovePageInheritance);
                        }
                        catch(LibraryException ex)
                        {
                            if (!ex.Message.Contains("An incorrect structure tree was found in the PDF file but operation continued"))
                            {
                                throw ex;
                            }
                        }

                        // For best performance processing large documents, set the following flags.
                        doc1.Save(SaveFlags.Full | SaveFlags.SaveLinearizedNoOptimizeFonts | SaveFlags.Compressed, sOutput);
                    }
                }

Java

				
					Document doc1 = new Document(sInput1);
        Document doc2 = new Document(sInput2);

        try
        {
            doc1.insertPages(Document.LAST_PAGE, doc2, 0, Document.ALL_PAGES, EnumSet.of(PageInsertFlags.BOOKMARKS,
                                             // For best performance processing large documents, set the following flags.
                                             PageInsertFlags.DO_NOT_MERGE_FONTS, PageInsertFlags.DO_NOT_RESOLVE_INVALID_STRUCTURE_PARENT_REFERENCES, PageInsertFlags.DO_NOT_REMOVE_PAGE_INHERITANCE));
        }
        catch(LibraryException ex)
        {
            if (!ex.getMessage().contains("An incorrect structure tree was found in the PDF file but operation continued"))
            {
                throw ex;
            }

            System.out.println(ex.getMessage());
        }

        // For best performance processing large documents, set the following flags.
        doc1.save(EnumSet.of(SaveFlags.FULL, SaveFlags.SAVE_LINEARIZED_NO_OPTIMIZE_FONTS, SaveFlags.COMPRESSED), sOutput);