This is an open-source JavaScript (CoffeeScript) widget for editing JSON data structures. Features include a JSON structural view with buttons for adding and removing objects and arrays, and a text view, with easy toggling between them, plus undo and redo.
To develop with automatic SCSS and CoffeeScript compilation, run bundle and then bundle exec guard
Feel free to send patches!
Live demo: http://andrewcantino.com/examples/jsoneditor/example.html
MIT License