How to detect errors in JSON Lines ?
Nothing could be easier to find errors in your JSONL file:
- Fill the editor with your JSONL: either copy-paste the JSONL or import your file.
- Your JSONL will automatically be analyzed, and lines with errors will be highlighted (in yellow). Detailed error messages will be displayed below the editor.
How to format JSONL file ?
This small tool also allows you to format your JSONL by clicking on the "Minify" button, each JSON line will be minified.
JSON lines validator
The JSONL (JSON Lines) format is increasingly used, especially in fields such as data science, machine learning, and big data processing. It combines the simplicity of JSON with a structure perfectly suited for large volumes of data.
Unlike a traditional JSON file, which contains a single object or array (and requires loading the entire content into memory), JSONL consists of one JSON record per line. This allows you to:
- Read and process data line by line, sequentially.
- Handle very large files without overwhelming memory (once a line is processed, there’s no need to keep it in memory).
- Easily add or remove lines without having to reparse the entire document.
- Simplify integration with command-line tools, scripts, and data streams.
In summary, JSONL is an easy-to-handle format that is both readable and efficient.
Why use JSONL?
The JSONL format is particularly suited for handling large amounts of data. Each line in a JSONL file is an independent JSON record, which allows for processing data line by line. This format is more efficient than the traditional JSON format for large files, as it does not require loading the entire file into memory.