Result appears here after you select
{ } How to use
- Paste a JSON array.
- Select Process.
- Each element comes back on its own line.
{ } How it works
JSON to NDJSON works on the text you provide. Select Process ▸ and it runs entirely in your browser — nothing is uploaded to a server — then shows the result in the Output panel.
Input
- JSON array — paste or type your input in the left panel (use Sample for an example)
Output
NDJSON text — copy or download it from the Output panel.
{ } Common uses
- Prepare data for a bulk-import endpoint that expects one record per line.
- Make a large export streamable, so a reader does not need the whole file in memory.
- Produce a file that can be appended to later.
{ } Limitations
- The input has to be an array, because NDJSON is a list of records. A single object would just be itself on one line.
- Each record is minified. That is not a setting — a pretty-printed record would span several lines and break every reader of the format.
{ } FAQ
Is my data uploaded to a server?
No. Everything runs locally in your browser — your files never leave your device.
Can I process more than one file at once?
This tool works on one input at a time.
Is this tool free?
Yes — it’s completely free and needs no sign-up.
Why is my output not indented?
Because NDJSON is defined by its newlines: a reader takes one line and parses it. Indenting a record would split it across lines and make the file unreadable to every tool that consumes the format.