Generate Thumbnails for PowerPoint PPTX/PPT in Java

readme.md

Learn more about how to generate thumbnails of PowerPoint PPTX/PPT presentations using Java: https://blog.aspose.com/2021/08/03/generate-thumbnails-for-powerpoint-using-java/

generate-pptx-thumbnail-custom-dimension.java

// Load PowerPoint presentation
Presentation presentation = new Presentation("presentation.pptx");

// User defined dimension
int desiredX = 1200;
int desiredY = 800;

// Getting scaled value of X and Y
float ScaleX = (float) (1.0 / presentation.getSlideSize().getSize().getWidth()) * desiredX;
float ScaleY = (float) (1.0 / presentation.getSlideSize().getSize().getHeight()) * desiredY;

// Iterate through the slides in the presentation
for (ISlide sld : presentation.getSlides()) {
  
	// Create a full scale image of the slide
	BufferedImage bi = sld.getThumbnail(ScaleX, ScaleY);

	// Create a new file to save image
	File outputfile = new File("Slide_" + sld.getSlideNumber() + ".png");

	// Save image
	ImageIO.write(bi, "png", outputfile);
}

generate-pptx-thumbnail.java

// Load PowerPoint presentation
Presentation presentation = new Presentation("presentation.pptx");

// Iterate through the slides in the presentation
for (ISlide sld : presentation.getSlides()) {
  
	// Create a full scale image of the slide
	BufferedImage bi = sld.getThumbnail(1f, 1f);

	// Create a new file to save image
	File outputfile = new File("Slide_" + sld.getSlideNumber() + ".png");

	// Save image
	ImageIO.write(bi, "png", outputfile);
}