The JSON input uses the Monaco library for its editor, so it has some very powerful tools built-in. You can access Monaco’s Command Palette by pressing the F1 key, where you can view and search for any additional functionality provided by the editor.
Along with all of the built-in features and keyboard shortcuts, the Fuuz JSON editor specifically provides 3 additional shortcuts, available from the context/right-click menu as well as the following keyboard shortcuts:
Stringify: Ctrl+'
Unstringify: Ctrl+Shift+'
Format: Alt+F
The JSON input when expanded into fullscreen mode with the “arrows” icon button near the top-right will also display the minimap on the right-side scrollbar.