Convert JSON arrays to JSONLines (also known as JSONL or NDJSON - Newline Delimited JSON) format. Each JSON object becomes a single line, perfect for streaming and big data processing.

Key Features

Array Processing: Converts JSON arrays to one object per line
Compact Mode: Optional minified output for smaller file sizes
Sort Keys: Alphabetically sort object keys for consistency
Statistics: View line count and size metrics
File Upload: Upload JSON files directly or paste data
Instant Preview: Real-time conversion as you type

How to Use

Input JSON Data: Paste your JSON array or upload a .json file
Configure Options: Choose compact mode and sorting preferences
Review Output: The JSONLines output updates automatically
Copy or Download: Save as .jsonl file for use in data pipelines

Example Conversion

JSON Input:

[
  {"id": 1, "name": "John", "age": 28},
  {"id": 2, "name": "Jane", "age": 34}
]

JSONLines Output (Compact):

{"id":1,"name":"John","age":28}
{"id":2,"name":"Jane","age":34}

Common Use Cases

Big Data: Process large datasets line-by-line in Hadoop, Spark, or similar tools
Streaming: Stream JSON data without loading entire arrays into memory
Log Files: Convert JSON logs to JSONL format for easier parsing
Database Import: Import data into databases that support JSONL
API Responses: Transform API responses for batch processing

What is JSONLines?

JSONLines (JSONL/NDJSON) is a text format where:

Each line is a valid JSON value (usually an object)
Lines are separated by newline characters (\n)
Files can be processed line-by-line without loading everything into memory
Perfect for streaming and big data applications

Format Specifications

Line Separator: Unix-style newline (\n)
Encoding: UTF-8
File Extension: .jsonl or .ndjson
MIME Type: application/x-ndjson

Privacy & Security

All conversions happen locally in your browser. Your JSON data is never uploaded to any server, ensuring complete privacy and security.