a handy online json editor v0.1b
.. now with mock web service publishing (click [ws] in the tool bar)
.. now deleting nodes works (right click to delete)
.. now adding nodes works (hover the lil oval below a container)

JSON Tinker

input: {"name":"jane","employed":false,"husband":null,"items":["haro",23,{"brand":"Duca"},true],"pets":[{"name":"chopper","color":"blue"},{"name":"yoshi","color":"green"},{"name":"mame","color":"青い"}],"height":170.4,"car":{"color":"red","model":"mini","clean":false}}

tools: >>
<0
<2
<\t
ws

workspace: