How to use API to combine PDF files into one?

Open the site: Merge PDF files . Drag and drop PDF files to join them. Or just use a code example in C++. Install C++ SDK and add the reference (import the library) to your C++ project. Open the source PDF file in C++. Load a document to append from the Cloud storage. Call the appendDocumentOnline() method, passing the output filename with the required extension. Get the combined result as a single file.

What other file formats can I merge my PDF to?

We support a variety of output file formats, including Microsoft Word, OpenOffice, PDF, Web document formats and many more.

What is the maximum size of a PDF file supported by this C++ library?

There are no file size limits for merging PDF files with our C++ SDK.

C++ Merge PDF REST API

Combine PDF using C++ REST API

Easily merge PDF files together in C++ code. This C++ library is designed to combine multiple PDF files into a single file using the REST API, i.e. by passing HTTPS calls over the Internet.

This is a professional Cloud-native PDF merging solution that provides C++ programmers with both great development flexibility and powerful features. Joining PDF files together is often used when it is necessary to create a set of documents of the same structure, each of which contains unique data. By merging PDF files, you can automate your digital workflows and offload some routine parts of the process to fast and efficient PDF processing C++ software.

Merge multiple PDF into one in C++

You may need to combine PDF files together in many cases. For example, you may want to combine multiple PDF files together before printing or archiving.

PDF merging can be part of a whole integrated document-processing approach for generating documents from disparate data sources. Such tasks involve the use of a full-featured PDF manipulation C++ library that will process a set of PDF files and merge them together in the shortest possible time, producing a compact and accurate result.

Merge PDF files in C++

To merge PDF in C++, you need at least two source PDF files. For a quick start, please check out the C++ code example below.

C++ code example to merge PDF files using REST API

Input files

Upload files you want to combine

Run code

Upload files you want to combine

Output format

Select the target format from the list

using namespace aspose::words::cloud;

auto config = std::make_shared<ApiConfiguration>(L"####-####-####-####-####", 
   L"##################");
auto wordsApi = std::make_shared<WordsApi>(config);

auto document = std::shared_ptr<std::istream>(new std::ifstream(
   std::filesystem::path(L"Input1.pdf"), std::istream::binary));

auto mergeDocument = std::make_shared<aspose::words::cloud::models::DocumentEntry>();
// Load a document to append from the Cloud storage.
mergeDocument->setFileReference(
   std::make_shared<aspose::words::cloud::models::FileReference>(
      std::make_shared<std::wstring>(L"Input2.pdf"));
mergeDocument->setImportFormatMode(
   std::make_shared<std::wstring>(L"KeepSourceFormatting"));

auto documentEntries = 
   std::make_shared<std::vector<std::shared_ptr<aspose::words::cloud::models::DocumentEntry>>>();
documentEntries->push_back(mergeDocument);

auto documentList = 
   std::make_shared<aspose::words::cloud::models::DocumentEntryList>();
documentList->setDocumentEntries(documentEntries);
std::shared_ptr<requests::AppendDocumentOnlineRequest> appendDocumentOnline(
    new requests::AppendDocumentOnlineRequest(
        document, documentList
    )
);
wordsApi->appendDocumentOnline(appendDocumentOnline);

					Run code
				

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How to merge PDF C++ REST API

Install C++ SDK and add the reference (import the library) to your C++ project.
Open the source PDF file in C++.
Load a document to append from the Cloud storage.
Call the appendDocumentOnline() method, passing the output filename with the required extension.
Get the combined result as a single file.

C++ library to join PDF files into a single file

Clone Aspose.Words Cloud SDK for C++ source code from GitHub. You can find detailed information on building and configuring the SDK in the "How to use the SDK" section.

To quickly get the necessary security credentials and access our REST API, please follow these Instructions in the documentation.

System Requirements

Refer to the Repository Documentation to see the details.

You can use other popular formats:

C++ API to combine PDF files programmatically

C++ SDK to combine PDF files and export the result to a wide variety of files formats