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How to use JSON ⇄ JSONL Converter

Paste a JSON array, and the tool converts it to JSONL/NDJSON (one object per line) — or paste JSONL to convert it back to an array.

Frequently asked questions

What is JSONL / NDJSON?

JSONL (also called NDJSON) is newline-delimited JSON — one complete JSON value per line. It is used for streaming, logs, and big-data pipelines.

Does it validate each line?

Yes — when converting JSONL back to an array, every non-empty line is parsed and the exact line number of any failure is reported.

Does the array need to be objects?

No — any JSON array works. Each element becomes one line, whether it is an object, number, string, or nested array.

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