JSON Lines explorer

Validate records and convert to an array.

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JSON Lines explorer processes your input in this browser. Inputs and results are excluded from analytics. Recent tools save tool names, visit counts and last-visit times. Saved tools store only their names. Draft saving is optional and stays on this device; delete saved text with the draft controls. Loading text from a URL is optional and contacts that server; its URL and your IP address are visible to the server. An optional “Use in” action keeps a handoff in this tab. The next tool removes it on arrival and ignores it if more than a minute has passed.

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Updated 2026-09-20

JSON Lines explorer explained

Treat each physical line as one complete JSON value, validate it and combine the records into an array. The reverse mode writes an array as newline-delimited JSON for logs and data pipelines.

Next: JSON to TypeScript

Next: JSON Schema validator

A worked example

A line containing 1 followed by a line containing {"a":2} becomes [1,{"a":2}]. A final newline is allowed; an empty record between values is reported.

Before you use the result

No multiline records or comments. Duplicate object keys and unsafe large integers are rejected. Decimal arithmetic follows JavaScript precision; quote exact values when their final digits matter.

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ToolOctopus. “JSON Lines explorer.” Updated 2026-09-20. https://tooloctopus.com/json-lines-explorer.

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