JSON Lines Inspector

Inspect JSONL for strict line errors, object-key coverage, top-level duplicate keys, and mixed value types.

Runs only in this browser. Limits: 1,000,000 characters, 50,000 lines, 2,000 keys, 100,000 fields, and 1,000 ms.

Blank lines are errors. A final line break is allowed.

JSONL input

0 / 1M

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Inspect JSONL for strict line errors, object-key coverage, top-level duplicate keys, and mixed value types.

Runs only in this browser. Limits: 1,000,000 characters, 50,000 lines, 2,000 keys, 100,000 fields, and 1,000 ms.

Blank lines are errors. A final line break is allowed.

0 / 1M