Convert JSON Arrays to JSON Lines Online Convert a JSON array into JSON Lines (JSONL) format — one object per line.

A JSON to JSON Lines is a file-conversion process that transforms a standard JSON array into JSON Lines format, where each line represents a complete, self-contained JSON value without any unnecessary whitespace or indentation. This conversion is commonly used by data engineers and developers who work with large datasets, log files, or streaming data, as it enables more efficient processing and analysis of the data one line at a time. One specific problem that this process solves is the need to convert json to ndjson format for big data processing tools, which often require input data in JSONL format.

The tool uses React's useCallback hook to memoize the conversion function, ensuring that it only re-renders when necessary, and takes an input string representing a JSON array. It checks if the parsed input is indeed an array, returning an error message if not, and then maps over each item in the array, converting it to compact JSON using JSON.stringify before joining them with newline characters. What makes this tool different is its ability to handle json to jsonl conversion directly within the browser, using a simple text-based interface that accepts input as a JSON array string.

When you use it, you can paste or type your json array into the input field and get back a json lines output, where each element of the original array becomes one line in the resulting ndjson format. The tool's output is ideal for applications requiring convert json to jsonl functionality, such as log processing or real-time data analysis tools that expect jsonl converter output.