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HeyTools

Data Tools

CSV ↔ JSON Converter

Convert CSV to a JSON array of objects, or turn a JSON array back into CSV. Choose a delimiter, keep work local in your browser, and copy or download the result.

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How to use

  1. Paste CSV or JSON
  2. Choose direction and delimiter
  3. Copy or download the converted output

Next step

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Frequently asked questions

Does the first CSV row become keys?

Yes. When converting CSV → JSON, the first row is treated as headers and each following row becomes an object.

What shape of JSON is required for JSON → CSV?

Provide a JSON array of objects. Column headers are the union of object keys; missing values become empty cells.

Is my data uploaded?

No. Conversion runs in your browser. Prefer that for customer lists or internal exports you should not paste into third-party services.