Free Developer Tool
JSON Lines Formatter
Format and beautify JSON Lines (NDJSON) documents while preserving one JSON object per line.
What is JSON Lines Formatter?
The JSON Lines Formatter improves the readability of NDJSON files by formatting each JSON object individually while preserving the JSON Lines format.
How to use
- Paste or upload JSON Lines.
- Format the document.
- Copy or download the result.
Features
- Pretty-print JSON Lines
- Preserve line structure
- Instant formatting
- Valid JSON output
Common Use Cases
- Reading log files
- Cleaning exported datasets
- Debugging NDJSON
- Preparing files for review
Example
Input
{"id":1,"name":"John"}Output
{
"id": 1,
"name": "John"
}FAQ
Does it keep one object per line?
Yes. The JSON Lines structure is preserved.
Can invalid JSON be formatted?
No. The input must first be valid JSON.
Can formatted data be copied?
Yes. The result can be copied or downloaded.
Missing a feature?
If this tool doesn't cover your use case or is missing functionality, please let me know through the Contact page.
New improvements and features are added based on user feedback.