Convert JSON Lines to CSV

Convert JSONL/NDJSON data into CSV format

JSONL Input

CSV Output

CSV output will appear here...

How to Use This Tool

This tool converts JSON Lines (JSONL/NDJSON) data into CSV. Each line should be a separate JSON object. Runs directly in your browser.

Provide your JSONL — Paste JSON Lines text or drop a file.
Get your CSV — The converted output appears instantly. Copy or save the result.

FAQ

2 questions

Does this tool upload my data?

No. It runs entirely in your browser. Your data is never sent to a server.

What if some lines have different fields?

The tool collects all unique keys across all lines and uses them as CSV columns. Missing fields are left empty.

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