NDJSON to JSON Converter — Convert Newline Delimited JSON to Arrays
Convert Newline-Delimited JSON (NDJSON / JSON Lines) into a standard JSON array instantly in your browser. Paste NDJSON records and get a formatted JSON array with compact, 2-space, 4-space, or tab indentation.
How to Use NDJSON to JSON Converter — Convert Newline Delimited JSON to Arrays
How to Use the NDJSON to JSON Array Converter:
Paste NDJSON: Paste your Newline-Delimited JSON (one JSON object per line) into the input textarea. You can also click one of the example buttons (Users, Log events, Mixed types) to load sample data.
Choose Indentation: Select how the output JSON array should be formatted:
- Compact — no whitespace, smallest possible output (good for APIs)
- 2 spaces — standard pretty-print (default)
- 4 spaces — wider indentation
- Tab — tab-indented output
Instant Conversion: The output updates automatically as you type or change options — no button press needed.
Handle Errors: If any lines cannot be parsed as valid JSON, they are silently skipped and listed in a warning panel below the output. Valid lines are still converted.
Copy or Download: Click Copy JSON to copy the array to your clipboard, or Download to save it as output.json.
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