JSON Lines to JSON
JSON Lines to JSON is a free online Data Conversion Tools tool that merge newline-delimited JSON records back into one array and report any malformed line by number 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.
How to use: JSON Lines to JSON →
Description
Merge newline-delimited JSON records back into one array and report any malformed line by number.
- Because everything is computed client-side, JSON Lines to JSON is safe to use with sensitive data such as API keys, tokens or private logs.
How to use
Using JSON Lines to JSON 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.
Examples
These ready-made examples show typical inputs and the exact output JSON Lines to JSON produces for them.
{"id":1,"name":"Ada"}
{"id":2,"name":"Grace"}
{"id":3,"name":"Alan"}Three NDJSON records merged into one array; malformed lines are reported by line number.
Use cases
Common situations where JSON Lines to JSON helps:
- Merge newline-delimited JSON records back into one array and report any malformed line by number.
- Because everything is computed client-side, JSON Lines to JSON is safe to use with sensitive data such as API keys, tokens or private logs.
FAQ
What is JSON Lines to JSON?
JSON Lines to JSON merge newline-delimited JSON records back into one array and report any malformed line by number. It runs entirely in your browser, so your data stays private.
Is JSON Lines to JSON free to use?
Yes. JSON Lines to JSON 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.