Free · No sign-up · Browser processing
JSON to NDJSON Converter
Convert a JSON array to newline-delimited JSON or turn JSON Lines back into a formatted array.
Each output line is one complete JSON value. Blank lines are ignored when importing; malformed lines report their line number.
STEP 1
Enter or paste your input
The example is ready to edit. Your input stays in this browser.
STEP 2
Choose your settings
Change the direction or options only if you need to.
Processed locally in your browser. Avoid sharing the result if it contains private data.
How to use JSON to NDJSON Converter
- Paste your input or load the included example.
- Choose the conversion direction and check the expected format.
- Select JSON to NDJSON, then inspect the result or any validation message.
- Copy or download the output for your workflow.
Format and limitations
Each output line is one complete JSON value. Blank lines are ignored when importing; malformed lines report their line number.
Example input
[{"id":1},{"id":2}]Practical guides
- JSON vs NDJSON: When to Use JSON Lines — Compare JSON arrays and newline-delimited JSON for logs, streaming APIs, exports, and incremental processing.
- How to Parse JSON Lines and Find Invalid Records — Parse NDJSON line by line, diagnose malformed records, and preserve useful error locations during imports.
Does this tool upload my input?
The transformation runs in your browser. This tool does not send input to a conversion API. Browser memory limits still apply; split very large inputs into manageable batches.