Mello
{} Developer

JSON ↔ CSV Converter

Convert between JSON and CSV — round-trip safe, runs locally.

Runs in your browserNo account requiredNo uploadFree
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About JSON ↔ CSV Converter

Paste an array of JSON objects to get a CSV table, or paste CSV to get back a JSON array. Common header columns are inferred automatically.

Frequently asked questions

They're stringified into the CSV cell. CSV is a flat format and can't represent nesting natively.

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