SQLable

About SQLable

SQLable's CSV to JSONL tool converts CSV data into JSON Lines format, where each row becomes a separate JSON object on its own line rather than being wrapped in a single array. The tool includes an in-browser editor for pasting or entering CSV content, with an automatic number detection option, and produces output that can be downloaded or copied.

The tool also exposes an API endpoint (POST to /api/csv/jsonl) that accepts CSV payloads up to 5 MB and returns the converted JSONL data, returning a 413 error for payloads exceeding the size limit.

It is intended for developers who need to transform CSV data for use with APIs or other services that expect JSON-based input, particularly when processing structured or large datasets line by line.

Key features

• Converts CSV data to JSONL (JSON Lines) format
• Automatic number detection for CSV fields
• Download or copy-paste the converted output
• REST API for programmatic CSV to JSONL conversion (max 5 MB payloads)

Frequently asked questions