Generate Thumbnails from PDFs in Java

This guide shows how to use a scaled page render to create a thumbnail image.

Render a Page to Scale

Creating a thumbnail uses the same method that’s used to render a page.

Using PdfPage.renderPage, pass the dimensions (in pixels) of the thumbnail to renderPage. For example, for a 50×50-pixel thumbnail, do the following:

final PdfDocument document = FileDataProvider(new File("document.pdf")));
final PdfPage page = document.getPage(0);
BufferedImage bitmap = page.renderPage(50, 50);

Saving a Bitmap to a File

renderPage returns a native Java BufferedImage object. Saving it out as a PNG image, for example, would look like this:

final BufferedImage bitmap = page.renderPage();
final File file = new File("out/test.png");
final boolean written = ImageIO.write(bitmap, "png", file);