JSON Lines to JSON Array
Convert newline-delimited JSON objects or values into one formatted JSON array and report invalid lines.
About JSON Lines to JSON Array
JSON Lines to JSON Array converts JSONL or NDJSON data—one valid JSON value per non-empty line—into a single formatted JSON array. Each line is parsed independently so an invalid record can be identified by its line number.
How to use JSON Lines to JSON Array
Paste JSON Lines data, with one JSON object or value on each line, then run the converter. ToolFlow validates every non-empty line and wraps the decoded records in one JSON array.
When JSON Lines to JSON Array is useful
- Turn exported JSONL logs into a standard JSON array for inspection.
- Prepare newline-delimited API data for tools that expect one JSON document.
- Find the exact line that contains malformed JSON.
Practical tips
- Each non-empty line must be a complete valid JSON value.
- Do not split one JSON object across multiple lines.
- Large JSONL datasets may be better processed in batches to keep browser responses manageable.
JSON Lines to JSON Array FAQ
Are blank lines allowed?
Yes. Blank lines are ignored.
What happens if one line is invalid?
The conversion stops and reports the first invalid line number and parser error.
Privacy and file handling
Submitted values are processed to produce the requested result. This tool does not require an external content-generation provider. Avoid submitting confidential information unless you are comfortable with the site's server and hosting retention policies. See the Privātums for details.