Something that ADAMS’ Preview Browser has had for years, I’ve now added to Weka as a standalone tab in the Explorer: displaying the content of serialized model files. It allows the user to load a serialized model file (or actually any Java serialized file) and display its content, simply using the objects’ toString() method.
You can find the Weka package here:
https://github.com/fracpete/serialized-model-viewer-weka-package