JSONL to array

jsonl-to-array · version 1.0.0 · JSON & JSONL · free, no key needed

Parse strict JSON Lines text into an array of JSON-safe values.

Use when you need to: jsonl to array · parse json lines into an array · convert jsonl to json array.

Supported

• jsonl to array
• parse json lines into an array
• convert jsonl to json array

Not supported

• JSONL comments
• NDJSON with blank lines
• concatenated JSON without newlines
• streaming parse
• read files

Behavior

• text is strict JSON Lines split on CRLF, CR, or LF.
• A trailing empty segment after a final newline is ignored; internal empty lines are rejected.
• Empty text or only a trailing newline yields an empty values array.
• At most 5000 lines are accepted.
• Each line is parsed with JSON.parse and must be a JSON-safe value: object, array, string, boolean, null, or safe integer.
• Parsed objects are rebuilt with a null prototype; prototype-like own keys are ordinary keys.
• Output values appear in file order.

Input

• text (string, required): max length 256000

Output

• values (array of any, required): max items 5000

Limits

• max input bytes: 256000
• max lines: 5000

Example

Request input:

{
  "text": "{\"name\":\"Ada\",\"ok\":true}\n\"שלום\"\n0\nnull\n"
}

Response:

{
  "result": {
    "values": [
      {
        "name": "Ada",
        "ok": true
      },
      "שלום",
      0,
      null
    ]
  }
}

How to call it

MCP

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

{
  "id": "jsonl-to-array",
  "version": "1.0.0",
  "input": {
    "text": "{\"name\":\"Ada\",\"ok\":true}\n\"שלום\"\n0\nnull\n"
  }
}

HTTP (no key)

curl -X POST https://computefirst.net/v1/tools/jsonl-to-array/versions/1.0.0/execute \
  -H "Content-Type: application/json" \
  -d '{"text":"{\"name\":\"Ada\",\"ok\":true}\n\"שלום\"\n0\nnull\n"}'

The machine-readable contract is at /v1/tools/jsonl-to-array/versions/1.0.0.

CLI

node cli.mjs run jsonl-to-array 1.0.0 --input input.json --base-url https://computefirst.net

Get the client at /clients/cli/.

Related tools

• Array to JSONL: Serialize an array of JSON-safe values as JSON Lines text.
• JSON array index by: Convert an array of objects into a single object indexed by a specific key.
• JSON flatten: Flatten a JSON value into a null-prototype map keyed by RFC 6901 JSON Pointers.
• JSON to CSV: Serialize string-valued JSON rows to CSV using explicit ordered columns.
• JSONL validate: Validate strict JSON Lines text and report the value count and UTF-8 byte length.
• JSON array anti join: Anti join two JSON arrays of objects on exact keys.