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Category: File Formats
Category: File Formats
JSONL (JSON Lines) is a text format where each line contains a valid JSON object, ideal for storing structured training data and model outputs.
Each line in a JSONL file is independently parseable JSON, allowing streaming processing of large datasets. Common schemas include prompt-completion pairs for language models.
The format supports appending new data without parsing the entire file, making it efficient for continuous data collection.
JSONL has become the standard for fine-tuning language models. Its line-by-line structure enables processing datasets too large to fit in memory.
OpenAI, Anthropic, and other AI providers use JSONL for their fine-tuning APIs and dataset formats.
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