JSON to JSONL Converter - Convert JSON Array to JSON Lines Format
Convert JSON arrays to JSONL (JSON Lines) format online. Transform JSON objects into newline-delimited JSON for streaming and log processing.
How to Convert JSON to JSONL - Step by Step Guide
Input Your JSON Array Data
Start by adding your JSON array data that needs to be converted to JSONL format. The tool works best with arrays of objects. Also try JSONL to JSON, JSON validator, or formatter.
Example: Try This JSON Array Data
Copy and paste this JSON array example to see conversion:
[ { "id": 1, "timestamp": "2024-01-15T10:30:00Z", "level": "info", "message": "User login successful" }, { "id": 2, "timestamp": "2024-01-15T10:31:15Z", "level": "warning", "message": "High memory usage detected" } ]
Configure JSONL Options
Customize how your JSON array is converted to JSONL format! Choose between compact or pretty-printed output.
Get JSONL Output
See your JSON data transformed into JSONL format! Each object becomes a separate line.
JSONL Output Result
Your JSON array becomes these newline-delimited JSON objects:
{"id":1,"timestamp":"2024-01-15T10:30:00Z","level":"info","message":"User login successful"} {"id":2,"timestamp":"2024-01-15T10:31:15Z","level":"warning","message":"High memory usage detected"}
Perfect for log processing and streaming data
Download or Copy JSONL Data
Perfect! Now you can use your JSONL data in log processing, streaming applications, and data pipelines.
What is JSON to JSONL Conversion?
JSON to JSONL conversion transforms JSON arrays into newline-delimited JSON format, where each line contains a complete, valid JSON object. This format is particularly useful for streaming data, log processing, and handling large datasets that don't fit in memory.
JSONL (also known as NDJSON or Newline Delimited JSON) allows you to process data line-by-line, making it ideal for real-time applications, data pipelines, and situations where you need to append data without parsing the entire file. It's widely adopted in big data processing, machine learning workflows, and logging systems.
Frequently Asked Questions
What is the difference between JSON and JSONL?
JSON is a single data structure (object or array), while JSONL contains multiple JSON objects separated by newlines. Each line in JSONL is an independent, valid JSON object that can be parsed separately. This makes JSONL perfect for streaming, logging, and processing large datasets line-by-line. Learn more in our JSON vs JSONL guide.
When should I use JSONL instead of JSON?
Use JSONL when you need to process data incrementally, handle large datasets that don't fit in memory, append data without re-parsing entire files, or work with streaming data. It's ideal for log files, event streams, machine learning datasets, and big data processing where you process records one at a time.
Can I convert nested JSON objects to JSONL?
Yes! The converter preserves the structure of nested objects. Each top-level object (or array element) becomes a single line in the JSONL output, with all nested properties maintained. You can choose between compact (single-line) or pretty-printed format for better readability during development.
Is JSONL compatible with standard JSON parsers?
Yes and no. Each individual line in a JSONL file is valid JSON and can be parsed with standard JSON parsers. However, the entire JSONL file is not valid JSON - you need to parse it line-by-line. Most modern data processing tools (like Python's jsonlines library, jq, and big data frameworks) have built-in JSONL support.
Can I convert large JSON files to JSONL?
Absolutely! The converter efficiently handles large JSON arrays by processing them into JSONL format. JSONL is particularly beneficial for large datasets because it allows line-by-line processing without loading the entire file into memory.
Is the JSON to JSONL converter free to use?
Yes, completely free with no limitations on JSON file size, conversion frequency, or output features. No registration required, and you can convert unlimited JSON data to JSONL format at no cost.