PDF Merge Tool Guide

Note：Before learning how to use different functions, we recommend that read the Request Workflow to know a basic PDF processing process. When using different functions, you can set their own special parameters when uploading files. Other basic steps are consistent.

PDF Merge:

• In the same task, upload multiple files (up to five). If pageOptions is not provided, it will merge multiple files.
• In the same task, upload multiple files (up to five). If pageOptions is provided, it will merge the specified pages of multiple files.

{
    "pageOptions": "['1,2']"
}

Required Parameters:

pageOptions: Page range of the merged documents, starting from 1. For example: 1,2,4,6,9-11 (if not provided, all pages are included by default; the provided page numbers cannot exceed the maximum page number of the document).

Java Example:

Replace apiKey with the publicKey obtained from the dashboard, file with the file you want to convert, and language with your preferred interface error prompt language type.

import java.io.*;
import okhttp3.*;

public class Main {
    public static void main(String[] args) throws IOException {
        List<File> filesToUpload = List.of(
            new File("file1.pdf"),
            new File("file2.pdf"),
            new File("file3.pdf")
        );
        OkHttpClient client = new OkHttpClient().newBuilder().build();
        MultipartBody.Builder bodyBuilder = new MultipartBody.Builder()
            .setType(MultipartBody.FORM)
            .addFormDataPart("language", "{{language}}")
            .addFormDataPart("password", "")
            .addFormDataPart("parameter", "{\"pageOptions\": \"['1,2']\"}");

        for (File file : filesToUpload) {
            bodyBuilder.addFormDataPart(
                "file", 
                file.getName(),
                RequestBody.create(
                    MediaType.parse("application/octet-stream"),  
                    file
                )
            );
        }
        Request request = new Request.Builder()
            .url("https://api-server.compdf.com/server/v1/process/pdf/merge")
            .method("POST", bodyBuilder.build())
            .addHeader("x-api-key", "{{apiKey}}")
            .build();
        Response response = client.newCall(request).execute();
    }
}

Result:

File Type	Description
.pdf	Merged PDF file