Convert NDJSON to a JSON array
Paste NDJSON (one JSON value per line) and combine it into a single JSON array, handy for logs, exports and LLM datasets. Blank lines are skipped and an invalid line is reported by number. The result is saved privately in your account.
No sign-up needed, runs instantly in your browser.
How it works
- 1Paste your NDJSON / JSON Lines
- 2Choose the indentation, then press Run
- 3Download the JSON array or find it in your files
Frequently asked questions
- What is NDJSON?
- Newline-delimited JSON, one complete JSON value per line, the common format for logs and streaming data.
- What happens with a bad line?
- You get a clear error naming the line number that failed to parse, so you can fix it.
Related tools
Paste a JSON array and convert it to NDJSON, one compact JSON value per line. This is the de-facto format for logs, streaming exports and LLM training and evaluation datasets. The result is saved privately in your account.
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Developer