In our iText 7.1.14 release we've added support for the WEBP image format to pdfRender 1.0.3. This is a modern image format which employs both lossy and lossless compression, and typically produces smaller images than JPEG or PNG at equivalent quality settings.

import com.itextpdf.licensekey.LicenseKey; import com.itextpdf.pdfrender.PdfRenderImageType; import com.itextpdf.pdfrender.PdfToImageRenderer; import com.itextpdf.pdfrender.RenderingProperties; import; import; public class WEBP_Example { public static final String DEST = "results/result"; public static final String SRC = "src/main/resources/simple.pdf"; private static final String KEY = "src/main/resources/itextkey_pdfRender.xml"; static { new File(DEST).getParentFile().mkdirs(); } public static void main(String[] args) throws IOException { LicenseKey.loadLicenseFile(KEY); RenderingProperties properties = new RenderingProperties(); properties.setImageType(PdfRenderImageType.WEBP); // Render PDF to images PdfToImageRenderer.renderPdf(new File(SRC), DEST, properties, null, null); } }
We do not currently have a pdfRender .NET library available, however we do have a CLI (command line interface) version which will work with multiple programming languages (including C# for .NET).
For more information regarding the pdfRender CLI please refer to our FAQ.