JSONL to JSON Array
Turn newline-delimited JSON (JSONL) into one JSON array.
From JSON Lines to an array
JSON Lines packs one JSON value per line, which is great for streaming and logs but awkward when a tool expects a single array. This converter stitches the lines into one array.
Paste your newline-delimited objects and it parses each line, preserving order, and emits a pretty-printed JSON array. If a line does not parse, it tells you exactly which one.
Clean and private
Parsing and assembly happen in your browser, so your data is never uploaded.
Frequently Asked Questions
What is JSONL?
JSON Lines is a format where each line is its own JSON value. It is common in logs, data exports, and machine-learning datasets.
What does this produce?
A single, pretty-printed JSON array holding every line’s value in order.
What if a line is invalid?
The tool reports which line failed to parse so you can fix it, rather than silently dropping data.
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