How to use this tool
- Paste a valid top-level JSON array; each element may be any JSON value.
- Run Convert JSON array to NDJSON to create one physical line per item.
- Review the result and diagnostics before copying or downloading.
Private by default
JSON Array to NDJSON Converter
Prepare bounded JSON Lines fixtures, logs, and import files without changing item values.
Your data stays in this browser
UTF-8Ln 1, Col 1
UTF-8—
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Your data stays in this browserInstantNo server round trips
PrivateBrowser-side processing
AuditableDocumented semantics
PortableCorrectly typed downloads
Category
JSON to NDJSON: How to use this tool
Write each item in a top-level JSON array as one compact NDJSON record.
Prepare bounded JSON Lines fixtures, logs, and import files without changing item values.
Open guide and examples
Example to try
Input JSON
[{"id":1,"event":"created"},{"id":2,"event":"updated","active":true}]Result
{"id":1,"event":"created"}
{"id":2,"event":"updated","active":true}Learn
Frequently asked questions
Is my data sent to a server?
No. The engine runs in your browser and applies local resource limits.
What happens with invalid input?
The tool reports a diagnostic and does not keep stale output.
What does JSON to NDJSON produce?
It emits compact UTF-8 NDJSON with one array item per line.
What limitation applies to JSON to NDJSON?
The JSON root must be an array; an empty array produces a valid empty NDJSON file.