JSON Compare

Compare two JSON documents by path, with lists matched by id and secrets masked.

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Paste a JSON document in A and B above, then press Compare JSON.

No choices: items match by id automatically

{
  "status": "pending",
  "items": [
    { "id": 1, "qty": 1 },
    { "id": 2, "qty": 2 }
  ]
}

{
  "items": [
    { "id": 3, "qty": 1 },
    { "id": 1, "qty": 1 },
    { "id": 2, "qty": 5 }
  ],
  "status": "paid"
}

Added: items[id=3]
Removed: none
Changed: items[id=2].qty (2 → 5)
Changed: status ("pending" → "paid")
Unchanged: items[id=1].qty

Fields are matched by path, such as customer.email, so key order and formatting never count. An added or removed object is one difference you can open.
Kinds count: 120.5 and "120.50" are a type change, while 1 and 1.0 are the same number. Missing, null, and "" stay apart.
Lists of objects with a unique id, key, uuid, or name match by it automatically. Other lists compare by position, or by a key you choose, or ignore order, where repeats still count.
Ignore fields that always change, such as requestId or **.updatedAt. A key defined twice is flagged, and its last definition is used.
Secret-looking values, such as access tokens, are masked and still compared. Reveal one on screen when you need it. Copies and downloads stay masked.