[zackbloom]

It's an editor for those JSON file formats which shows contextual help as you edit the files, similar to an IDE. It works by parsing the javascript and figuring out where your cursor is relative to the syntax of that particular format.

[jmhnilbog]

I'm not seeing any of that.

[Twirrim]

Likewise. The landing page gave me no clue. I just now went back and clicked on one of those documents, assuming that I'd get some kind of documentation about the format. Turns out it opened a live document editor. I certainly wouldn't have predicted that from the line "Open-source documentation for common JSON formats."