Free · List the field names in JSON objects

JSON Key Inventory

Use $keys to list top-level keys and the shared keys found in array records.

Real JSONata 2.2 query
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Time and result safety caps

List JSON keys

Paste JSON, edit the JSONata expression, and run it locally with time, depth, and result limits.

Add JSON and a queryBoth stay in this browser tab

JSON data 1,255 / 120,000 characters

{
  "store": {
    "name": "Little Leaf Market",
    "currency": "CAD"
  },
  "orders": [
    {
      "id": "A-100",
      "customer": "Mia",
      "city": "Toronto",
      "status": "paid",
      "total": 84.5,
      "items": 3,
      "tags": [
        "gift",
        "new"
      ]
    },
    {
      "id": "A-101",
      "customer": "Noah",
      "city": "Ottawa",
      "status": "pending",
      "total": 42,
      "items": 1,
      "tags": [
        "new"
      ]
    },
    {
      "id": "A-102",
      "customer": "Ava",
      "city": "Toronto",
      "status": "paid",
      "total": 126.25,
      "items": 4,
      "tags": [
        "vip",
        "gift"
      ]
    },
    {
      "id": "A-103",
      "customer": "Liam",
      "city": "Montreal",
      "status": "refunded",
      "total": 58.75,
      "items": 2,
      "tags": [
        "return"
      ]
    },
    {
      "id": "A-104",
      "customer": "Emma",
      "city": "Ottawa",
      "status": "paid",
      "total": 199,
      "items": 5,
      "tags": [
        "vip"
      ]
    },
    {
      "id": "A-105",
      "customer": "Mateo",
      "city": "Toronto",
      "status": "pending",
      "total": 72.25,
      "items": 2,
      "tags": [
        "gift"
      ]
    }
  ]
}

JSONata expression 50 / 1,000 characters

Bounded local queryJSONata 2.2.2 · 800 ms timeout · $eval off

See the resultReady when you are

Your query result will appear here

JSONata can filter, sort, group, calculate, and reshape the sample without an upload.

Three simple steps

How to use it

Paste JSON with objects or records.
Point $keys at each object level.
Review the field-name inventory.

Your JSON stays on this device

JSONata reads and transforms the JSON inside this browser tab. Bookify does not upload or save the data or expression. Every run has time, sequence, stack, input, and output limits, and $eval stays disabled.