JSONL Converter
Convert JSON array and JSON Lines
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Output
Converted output will appear here
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About this tool
Convert between JSON array and JSONL (JSON Lines / NDJSON) formats with automatic direction detection. This is helpful for logs, data pipelines, machine learning datasets, and import/export tasks that require line-delimited JSON records. Output can be copied directly for CLI or ETL usage.
Frequently Asked Questions
What is the difference between JSON and JSONL?
JSONL stores one JSON object per line, while JSON array stores all objects inside one array structure.
Can this convert NDJSON?
Yes. NDJSON is line-delimited JSON and is compatible with JSONL conversion here.
Why does conversion fail on some lines?
Any invalid JSON line causes parsing errors. Make sure each non-empty line is valid JSON.