Private JSONL workbench

Inspect JSONL rows and convert them.

Paste logs or API output once, review line errors and key differences, then explicitly convert to CSV or a JSON array. Processing stays in this browser.

Enter JSONL

JSON Lines (one JSON value per line)

Limits: 10 MiB / 10,000 lines / 512 KiB per line / depth 64. No automatic saving, upload or external transmission.

Inspect rows

Output settings

Missing keynullEmpty string

Results

CSV

JSON array

What it handles

Invalid lines, empty lines and duplicate keys show line numbers; exports remain unavailable until every line is valid.
Object keys appear in first-seen order. Nested values stay JSON text, and large numbers retain their source notation.
JSON arrays accept any valid JSON values; CSV is available only when every valid row is an object.