I’ve found that Cocoa JSON Editor work’s well enough. (PS: I work on a Mac.) Nonetheless, this editor – as well as the other JSON editor’s I’ve played with – lack certain features that are key to creating or iterating on ACF field groups. For example, it would be extremely useful to be able to automatically generate unique IDs, save snippets (or somehow be able to automatically insert a predefined field or set of fields), among others.
I think it would be relatively easy to build a web interface that solves most of these issues, but alack! I have literally zero free time at the moment…
