JSON deep equal

json-deep-equal · version 1.0.0 · JSON & JSONL · free, no key needed

JSON-only structural equality. Object key order does not matter; array order does.

Use when you need to: json deep equal · json equals · structural json equality.

Supported

• json deep equal
• json equals
• structural json equality

Not supported

• reference equality
• date compare
• json patch
• epsilon floats

Behavior

• Accept only JSON values: null, boolean, finite number, string, array, and plain objects.
• Reject NaN, Infinity, -Infinity, undefined, BigInt, functions, symbols, Date, Map, Set, RegExp, boxed primitives, Buffer, and sparse holes.
• Canonicalize -0 to 0.
• Objects may have null or Object.prototype; comparison uses own enumerable string keys only.
• Treat __proto__, constructor, and toString as ordinary own keys. Never mutate Object.prototype.
• Output objects are Object.create(null). Returned JSON values are deep-cloned.
• Bound walk: max depth 32, max nodes 10000 per value.
• null, booleans, and strings compare with === after JSON validation.
• Numbers compare with Object.is after canonicalizing -0 to 0. No epsilon.
• Arrays require the same length and pairwise equality. Objects require the same own-key set and equal values; key insertion order is ignored.
• Prototype-like keys are ordinary own keys.

Input

• a (any JSON value, required)
• b (any JSON value, required)

Output

• equal (boolean, required)

Limits

• max json depth: 32
• max json nodes: 10000

Example

Request input:

{
  "a": {
    "k": 1,
    "m": 2
  },
  "b": {
    "m": 2,
    "k": 1
  }
}

Response:

{
  "result": {
    "equal": true
  }
}

How to call it

MCP

Connect https://computefirst.net/mcp (setup), then call execute with:

{
  "id": "json-deep-equal",
  "version": "1.0.0",
  "input": {
    "a": {
      "k": 1,
      "m": 2
    },
    "b": {
      "m": 2,
      "k": 1
    }
  }
}

HTTP (no key)

curl -X POST https://computefirst.net/v1/tools/json-deep-equal/versions/1.0.0/execute \
  -H "Content-Type: application/json" \
  -d '{"a":{"k":1,"m":2},"b":{"m":2,"k":1}}'

The machine-readable contract is at /v1/tools/json-deep-equal/versions/1.0.0.

CLI

node cli.mjs run json-deep-equal 1.0.0 --input input.json --base-url https://computefirst.net

Get the client at /clients/cli/.

Related tools

• JSON deep diff: Bounded deterministic JSON difference records. Not a JSON Patch implementation.
• JSON array filter equals: Filter JSON array objects where a key equals a specific value.
• Array to JSONL: Serialize an array of JSON-safe values as JSON Lines text.
• JSON array anti join: Anti join two JSON arrays of objects on exact keys.
• JSON array concat: Concatenate multiple JSON arrays of objects into one.
• JSON array count: Count structural occurrences in a JSON array in first-seen order.