The code to merge PNG in Java

High-speed Java library to merge PNG files

This is a professional solution to combine PNG using Java. Use our PNG merging API to create portable, robust and secure software in Java. Try it online for free!

Convert PNG in Java

Java library allows Java developers to convert PNG images easily. PNG image conversion engine analyses the original PNG content, then exports the combined graphical content to the required format.

PNG image conversion may be tricky, unless you have a professional tool to do the job. Use Java to convert PNG images with maximum flexibility and speed. Run online live demo and check the highest image quality right in a browser. PNG Conversion API supports a bunch of useful options.

Merge PNG in Java

Enhance PNG image format capabilities with Aspose.Words for Java. This is a simple way to combine PNG images with Java library that handles all low-level details.

Merge PNG images and save the result as a single file. If you develop code in Java, this will be simpler than it sounds. See Java example that iterates through PNG images and combines them:

Code example in Java to merge PNG files
Input files
Upload a file you want to merge
Run code
Upload a file you want to merge
Output format
Select the target format from the list
import com.aspose.words.*;

List<String> fileNames = Arrays.asList("Input1.png", "Input2.png");

Document doc = new Document();
DocumentBuilder builder = new DocumentBuilder(doc);

List<Shape> shapes = -> {
    try {
        return builder.insertImage(fileName);
    } catch (Exception e) {
    return null;

// Calculate the maximum width and height and update page settings 
// to crop the document to fit the size of the pictures.
PageSetup pageSetup = builder.getPageSetup();
pageSetup.setPageWidth( -> shape.getWidth()).max().getAsDouble());
pageSetup.setPageHeight( -> shape.getHeight()).sum());
Run code

How to merge PNG

  1. Install 'Aspose.Words for Java'.
  2. Add a library reference (import the library) to your Java project.
  3. Open the source PNG file in Java.
  4. Combine PNG files in a few seconds.
  5. Call the 'appendDocument()' method, passing an output filename with required extension.
  6. Get the result of merging PNG as a single file.

Java library to merge PNG files

We host our Java packages in Maven repositories. 'Aspose.Words for Java' is a common JAR file containing byte-code. Please follow the step-by-step instructions on how to install it to your Java developer environment.

System Requirements

Java SE 7 and more recent Java versions are supported. We also provide a separate package for Java SE 6 in case you are obliged to use this outdated JRE.

Our Java package is cross-platform and runs on all operating systems with JVM implementation, including Microsoft Windows, Linux, macOS, Android and iOS.

For information on optional package dependencies, such as JogAmp JOGL, Harfbuzz font engine, Java Advanced Imaging JAI, please refer to Product Documentation.

Other Supported PNG Merge operations

You can merge PNG to many other file formats:


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