Hello fellow Makers,
I'm happy to announce that currently I'am working on Save Editor module for RMMV Toybox.
Here is the preview for current progress:

As you can see, currently this tool just edits the .rpgsave data as JSON formatted script using drop-dead-simple script editor.
My goal is to create save editor with GUI that fully integrated with RPG Maker project's data consisting of a form with text fields, selection box, check box, etc.
This early version of save editor is available on latest version of RMMV Toybox.
Enjoy~