What is JSON Lines?
JSON Lines stores one valid JSON value per line, often used for logs and datasets.
JSON tool
JSON Lines to JSON
Convert JSONL or NDJSON rows into a JSON array, or convert a JSON array back to JSON Lines.
Common use cases
- Format API responses for debugging.
- Clean JSON before sharing it in docs.
- Prepare examples for prompts, tests and frontend code.
Example input
{"id":1,"name":"JSON Formatter"}
{"id":2,"name":"AI JSON Repair"}Related tools
AI JSON Repair
Fix broken JSON from ChatGPT, APIs, logs and config files with local repair and optional AI fallback.
JSONFreeJSON Formatter
Prettify JSON with readable indentation, validation and one-click copy.
JSONFreeJSON Validator
Validate JSON syntax and find parse errors before using it in code or APIs.
JSONFreeJSON Minifier
Remove whitespace from JSON for compact API payloads and config snippets.
JSONFreeJSON to CSV
Convert JSON arrays and objects into CSV tables for spreadsheets and reports.
JSONFreeCSV to JSON
Convert CSV tables into JSON arrays with header-based object keys.
JSONFreeFAQ
Can blank lines be included?
Blank lines are ignored when converting JSON Lines to an array.
What is NDJSON?
NDJSON is newline-delimited JSON, another name for the same common format.