NDJSON to JSON Converter

Convert newline-delimited JSON (NDJSON / JSONL) to a standard JSON array in your browser. Nothing uploaded.

By AbraCalc Editorial Team · Reviewed by AbraCalc Methodology Review · Last reviewed: 2026-06-25

NDJSON (one JSON object per line)

Pure browser JavaScript (uses the built-in JSON parser).

Embed this tool on your site

<iframe src="https://abracalc.com/app/ndjson-to-json/" width="100%" height="640" style="border:1px solid #e4e7ec;border-radius:12px" loading="lazy"></iframe>

How to use this tool

Paste NDJSON — one JSON object per line.
Click Convert to JSON Array.
Copy or download the resulting JSON.

Convert newline-delimited JSON (NDJSON / JSONL) to a standard JSON array in your browser. Nothing uploaded.

Frequently asked questions

What is NDJSON?: Newline-Delimited JSON (NDJSON / JSONL) stores one JSON object per line, common in log files and streaming APIs.

References & sources

NDJSON specification