Private, browser-local utility
JSON Lines Converter
Convert between a JSON root array and newline-delimited JSON records locally.
Your input and result stay in this browser tab. Nothing is uploaded, fetched, executed, logged, or stored.
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Result
Conversion policy
JSON-to-JSON-Lines requires one root array and writes each element as one valid JSON value per line. JSON-Lines-to-JSON treats every nonempty line as one JSON value and rejects blank or malformed records with a line number. LF and CRLF are supported.
V1 is bounded to 5 MB input, 50,000 records, and 10 MB output. It performs no streaming, upload, schema inference, validation, or remote processing.