The Digital Invisible Ink Toolkit is a small java program that can embed messages (files) inside 24-bit colour images in such a way that the resulting image does not appear affected. The algorithms implemented by the tool are part of a group of techniques called steganography, which is just a fancy word for information hiding. The idea of this toolkit is to provide a framework where users can add their own algorithms for steganography, or just use the current implementations to effectively hide their messages. This initial release provides a gui, 4 different algorithms, 2 different filters (used by the algorithms for hiding) and the ability to simulate hiding on a black image (so you can see where it puts it). The source contains a small amount of benchmarking code which is currently being worked on and will appear in future releases. Java 1.4 with the Advanced Imaging Toolkit or Java 1.5 is required for this tool to run.