CSV ↔ JSON Converter

Convert CSV to JSON or JSON to CSV instantly. Handles quoted fields, custom delimiters, and nested headers.

Two-way conversionCustom delimiterNo data stored

Quick load:

CSV Input

JSON Output

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RFC 4180 compliant: The CSV parser correctly handles quoted fields, embedded commas, escaped double-quotes (""), and all common line endings. The Swap button moves the current output into the input and flips direction.

All conversion happens locally in your browser. No data is sent anywhere.