Turn PNG Images into PDFs in Java—Fast and Reliable

If your Java application needs to generate PDFs from PNG images, this article shows how to put that functionality in place quickly using the GroupDocs.Conversion Cloud SDK for Java. Instead of building custom image-handling logic or managing PDF libraries, you can rely on a cloud-based conversion API that delivers consistent, production-ready output with minimal setup.

The guide walks through the full conversion flow, from submitting PNG files to defining PDF output options and retrieving the final document. With the Java SDK handling communication and configuration, you can integrate PNG-to-PDF conversion into backend services, reporting modules, or batch processing tasks without introducing unnecessary complexity.

By following this detailed tutorial, you can add image-to-PDF capabilities to your Java applications in a practical, scalable way. It’s an efficient solution for teams that need clean PDF generation from images while keeping their codebase simple and focused on core business logic.

Code example:

package com.groupdocs;
import com.groupdocs.cloud.conversion.client.*;
import com.groupdocs.cloud.conversion.model.*;
import com.groupdocs.cloud.conversion.api.ConvertApi;
import com.groupdocs.cloud.conversion.model.requests.*;

public class ConvertPNGtoPdf {

    public static void main(String[] args) {

        // Set up client credentials and initialize configuration
        String MyClientId = "your-client-id";
        String MyClientSecret = "your-client-secret";
        Configuration configure = new Configuration(MyClientId, MyClientSecret);

        // Initialize conversion API to convert PNG to PDF
        ConvertApi conversionAPI = new ConvertApi(configure);

        // Initialize ConvertSettings
        ConvertSettings settings = new ConvertSettings();
        // Source file path in the cloud storage
        settings.setFilePath("SampleFiles/source.png");
        settings.setFormat("pdf"); // Set output format
        // Specify output path in the cloud storage
        settings.setOutputPath("conversion/result.pdf");

        // Configure PDF conversion options
        PdfConvertOptions convertOptions = new PdfConvertOptions();
        convertOptions.setMarginTop(10);
        convertOptions.setMarginBottom(10);
        settings.setConvertOptions(convertOptions);

        try {
            // Create and execute the PNG to PDF conversion request
            ConvertDocumentRequest request = new ConvertDocumentRequest(settings);
            conversionAPI.convertDocument(request);

        } catch (Exception e) {
            System.err.println("Error occurred: " + e.getMessage());
        }
    }
}