This is a simple proof of concept project.
This is not stenography, since the text within the image is not hidden og encrypted in any particular way.
It is not optimized in any way, no encoding/encrypting, alpha values in PNG is not used, images within the image are stored as Base64. I have no ambitions for implementing optimizations, since this is a simple, working proof of concept.
Building the image
Please see the online converter
Old java version
This will create image.png from the textfile
java -jar pictureit.jar testfile.txt