How to use: JSON to JSON Lines
JSON to JSON Lines is a free online Data Conversion Tools tool that turn a JSON array into newline-delimited NDJSON, one standalone object per line instantly in your browser. Paste your data, adjust the options and get the result in real time — no installation, no sign-up, and nothing is ever uploaded to a server.
Description
Turn a JSON array into newline-delimited NDJSON, one standalone object per line.
- Data Conversion Tools
- Because everything is computed client-side, JSON to JSON Lines is safe to use with sensitive data such as API keys, tokens or private logs.
How to use
Using JSON to JSON Lines takes three steps:
- Paste your data into the input box (or load the example).
- Configure the options to match your target format or scenario.
- Copy, download or inspect the output — it updates live as you type.
Run
Examples
A JSON array of three objects, emitted as one standalone JSON object per line.
Input
[{"id":1,"name":"Ada"},{"id":2,"name":"Grace"},{"id":3,"name":"Alan"}]
Output
{"id":1,"name":"Ada"}
{"id":2,"name":"Grace"}
{"id":3,"name":"Alan"}
This output was produced by actually running the tool, not written by hand.
Use cases
Common situations where JSON to JSON Lines helps:
- Turn a JSON array into newline-delimited NDJSON, one standalone object per line.
Parameters
| key | Options | type | allowed | default | JSON to JSON Lines |
|---|---|---|---|---|---|
dir | Direction | select | a2j (JSON array → JSON Lines), j2a (JSON Lines → JSON array), v (Validate JSON Lines) | — | a2j |
Input: text · Output: text · live update while typing: ✓
FAQ
What is JSON to JSON Lines?
JSON to JSON Lines turn a JSON array into newline-delimited NDJSON, one standalone object per line. It runs entirely in your browser, so your data stays private.
Is JSON to JSON Lines free to use?
Yes. JSON to JSON Lines is free, unlimited and works without registration or installation.
Does my data get uploaded?
No. All processing happens locally in your browser; nothing is sent to any server.
Good to know
- Everything runs client-side, so extremely large inputs are limited by your browser tab’s memory rather than by a server upload limit.