What does this tool do?
Paste a JSON array below to convert it into newline-delimited JSON (NDJSON). Everything runs locally using JavaScript in your browser — nothing you paste or upload is ever sent to a server.
How to use this tool
- Paste your your json into the left-hand box.
- Click Convert to NDJSON.
- Copy the ndjson output from the right-hand box.
Frequently asked questions
What input does this expect?
A JSON array — each element becomes one line of NDJSON output. A single object is converted to one line.
Why convert to NDJSON?
Many log pipelines, streaming APIs, and big-data tools (like BigQuery imports or Elasticsearch bulk loads) expect one JSON record per line rather than a single large array.
Is the output minified?
Yes — each line is compact JSON with no extra whitespace, which is the standard NDJSON convention.