Read and Write PNG Files in Java with JDeli
JDeli provides fast, pure-Java PNG support, allowing you to read, write, and convert PNG files with greater control than Java’s built-in ImageIO. While ImageIO includes basic PNG support, JDeli processes PNG images up to 3x faster, supports custom encoder options, and handles EXIF metadata correctly. JDeli runs without native dependencies, works consistently across platforms, and eliminates the JVM crash risk that comes from native-dependent alternatives.
Frequently Asked Questions
Can JDeli read PNG files in Java?
Yes. JDeli can read PNG files and return a BufferedImage. It processes PNG images up to 3x faster than ImageIO.
Can JDeli write PNG files in Java?
Yes. JDeli can write BufferedImage objects to PNG format with control over encoder settings. See the Java PNG writer guide for a code example.
Does JDeli support EXIF metadata in PNG files?
Yes. JDeli can read and write EXIF metadata in PNG files. When converting a PNG file to another supported format, EXIF metadata is copied across automatically.
Is JDeli faster than ImageIO for PNG processing?
Yes. JDeli processes PNG images up to 3x faster than ImageIO, which makes a measurable difference for high-volume or large-image workloads.
Does JDeli’s PNG support require native libraries?
No. JDeli’s PNG implementation is pure Java. It runs consistently across platforms without the JVM crash risk that comes from native-dependent alternatives.
Can JDeli be used as a drop-in replacement for ImageIO with PNG files?
Yes. JDeli is available as an ImageIO plugin, so existing code that calls ImageIO for PNG reading and writing will automatically use JDeli without any code changes. See the ImageIO migration guide for details.