In this article, I will walk you through how to write out images as WebP images in Java. We also have a related article covering how to read WebP files in Java.
ImageIO does not support WebP images by default so you will need to use an ImageIO plugin or an external library. I will demonstrate using an Open source ImageIO plugin (which extends ImageIO to provide WebP support), and using the JDeli Image Library.
How to write a WebP image in Java with ImageIO
Step 1 Download webp-imageio plugin and add it to your classpath.
Step 2 Create a File (or OutputStream) object
File file = new File("/path/to/outputFile.webp"));
Step 3 Pass image, WebP type, and File (or OutputStream) object into write method
ImageIO.write(bufferedImage, "webp", file);
How to write an image as a WebP file with JDeli
Step 1 Add JDeli to your class or module path. (download link to the trial jar).
Step 2 Create a File (or OutputStream) object
File file = new File("/path/to/outputFile.webp"));
Step 3 Pass image, WEBP type, and File (or OutputStream) object into write method
JDeli.write(bufferedImage, "webp", file);
In JDeli you can also use a typesafe version
JDeli.write(bufferedImage, OutputFormat.WEBP, file);
or pass in a WebpEncoderOptions object for more control over WebP image output, such as level of Compression.
WebpEncoderOptions options = new WebpEncoderOptions();
JDeli.write(bufferedImage, options, file);
Start reading and writing images with one line of code
Read: BufferedImage image = JDeli.read(streamOrFile);
Write: JDeli.write(myBufferedImage, OutputFormat.HEIC, outputStreamOrFile)
I don’t see any difference between the lines of code for “how to write image with ImageIO” and “JDeli.” Did you accidentally copy the same lines of code to both examples?
Hi Roman. Thank you for letting us know, we must have missed that! We have now changed it and updated the article, hope that helps.