Data converters
JSON to NDJSON
Convert a JSON array into newline-delimited JSON records. Nothing you enter leaves your browser.
Your result will appear here.
What this tool does
About the JSON to NDJSON
This converter reads JSON input and rewrites the same usable information as NDJSON. It changes the representation, not the meaning of the source data, except where the target format cannot express the same structure.
It is useful when data needs to move between spreadsheets, APIs, configuration files, databases, or documentation without retyping records.
How to use it
- Paste JSON array in the input pane. Use the example button if you want to see the expected syntax.
- Review the input for the structure shown in the example. Then select “Convert to NDJSON.”
- Inspect the result for warnings or structural differences, then copy it into the destination system.
Practical example
Start with a known input
Try this sample input:
[{"name":"Avery","active":true},{"name":"Jordan","active":false}]
Select “Convert to NDJSON” and compare the result with the source before using it elsewhere. What to know about the result
- JSON preserves nested objects, arrays, numbers, booleans, and null values, but it requires quoted property names and does not allow comments.
- NDJSON stores one complete JSON value per line. It is useful for logs and streaming workflows where records are processed independently.
- Processing happens in this browser. Your entered text and selected files are not sent to FormatCalc for conversion.
Common questions
Using the JSON to NDJSON
Is the JSON to NDJSON free to use?
Yes. FormatCalc's JSON to NDJSON is free to use with no account required.
Is my data private when I use the JSON to NDJSON?
Yes. This tool processes your input locally in your browser. FormatCalc does not upload or store what you enter.
How do I use the JSON to NDJSON?
Paste or type your input, select any available options, and choose Convert to NDJSON. You can then copy the result.
What should I check before using the result?
JSON preserves nested objects, arrays, numbers, booleans, and null values, but it requires quoted property names and does not allow comments. NDJSON stores one complete JSON value per line. It is useful for logs and streaming workflows where records are processed independently. Processing happens in this browser. Your entered text and selected files are not sent to FormatCalc for conversion.