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NDJSON and JSON Converter

Convert newline-delimited JSON records to a JSON array or convert an array to NDJSON.

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01
Add your input
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02
Make it yours
Adjust the options and run the action.
03
Take the result
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Newline Delimited JSON and JSON Converter online

Move between line-oriented JSON records and a JSON array. Each non-empty NDJSON line must contain one complete JSON value; pretty-printed multiline records are not NDJSON.

How to use it

Enter the source input or select Try example. Review Action. Select Run tool and inspect the result before copying or downloading.

Options and example settings

Option	Choices / value	Example default
Action	NDJSON → JSON array; JSON array → NDJSON	NDJSON → JSON array

Worked examples

Move between line-oriented JSON records and a JSON array.

Worked example — NDJSON and JSON Converter

Settings: Action: NDJSON → JSON array

Input:

{"id":1}
{"id":2}

Output:

[
  {
    "id": 1
  },
  {
    "id": 2
  }
]

The example returns 2 top-level items in an array. Each item is a record; the first record contains “id”.

Limitations and common mistakes

Each non-empty NDJSON line must contain one complete JSON value; pretty-printed multiline records are not NDJSON.

Frequently asked questions

How can I transform newline-delimited JSON records to a JSON array or convert an array to NDJSON online?

Enter the source input or select Try example. Review Action. Select Run tool and inspect the result before copying or downloading.

Where is my input processed?

The bundled tool processes input in your browser. It does not upload tool input to a conversion service. Other site plugins, analytics, advertising and browser extensions may have separate behavior.