Developer tools

JSON Patch applier

Apply a checked sequence of add, remove, replace, move, copy and test operations.

Your inputs

JSON document

UTF-8 JSON up to 2 MB, 50,000 values and 64 levels. Duplicate object member names are rejected; numeric tokens are preserved.

UTF-8 JSON, NDJSON or GeoJSON up to 2 MB. Files stay on this device.

Or choose a JSON file

JSON Patch operation array

UTF-8 JSON up to 2 MB, 50,000 values and 64 levels. Duplicate object member names are rejected; numeric tokens are preserved.

UTF-8 JSON, NDJSON or GeoJSON up to 2 MB. Files stay on this device.

Or choose a JSON file

Results update as you type. Larger files run when you press Update result.

Processed on your device

Your result

LOCAL & PRIVATE

Your result will appear here.

Your inputs stay in this browser. Nothing is uploaded or saved.

A clear answer. Here’s how.

Applies up to 200 RFC 6902 operations to a copy of the input. Uses strict JSON Pointers, ordered array insertion and structural test equality; numerically equivalent decimal tokens compare equal exactly. Failed operations produce no partial output. Moving a node into its descendant is rejected. Removing the entire root is unsupported because it would leave no JSON value; replace root with null instead. Each intermediate/result document must remain within 2 MB and 64 levels.

See a worked example

Worked example

A fixed demonstration, separate from the values you enter above.

JSON document: {"name":"Ada","items":[{"id":9007199254740993,"active":true},{"id":2,"active":false}],"settings":{"theme":"blue"}}
JSON Patch operation array: [{"op":"test","path":"/name","value":"Ada"},{"op":"add","path":"/items/-","value":{"id":3,"active":true}}]

Example result

{
  "name": "Ada",
  "items": [
    {
      "id": 9007199254740993,
      "active": true
    },
    {
      "id": 2,
      "active": false
    },
    {
      "id": 3,
      "active": true
    }
  ],
  "settings": {
    "theme": "blue"
  }
}

All operations were applied to a copy; failed operations return no partial result.