JSON

Every key of every object should be alphabetically sorted.

Bad

{
  "a": 1,
  "c": 1,
  "b": {
    "y": 1,
    "x": 1,
    "z": 1
  }
}

Good

{
  "a": 1,
  "b": {
    "x": 1,
    "y": 1,
    "z": 1
  },
  "c": 1
}