JSON ↔ JSONL Converter
Convert between JSON arrays and JSONL (JSON Lines) format. Edit either side and the other updates automatically.
JSON
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JSONL
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About JSONL (JSON Lines)
- • JSONL stores one JSON object per line — ideal for streaming and log processing
- • Widely used for ML training data (OpenAI fine-tuning, BigQuery, etc.)
- • Unlike JSON arrays, JSONL files can be appended to without rewriting