FileInImage
Use GUI combine file with image.
You can take package format file merging into the image, like "rar" "zip" "7z".
when your synthetic image changed back to the original file format it is still available.
This program requires .Net Framework 3.5 or later version to run.
Developed by Skim, JoJunIori.
Designed by JoJunIori.
Dependencies with VS2017.
Sample
Open
Drag & Drop image, file into box
Output
License
GPLv3