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JSON to CSV Converter

The JSON to CSV Converter turns an array of JSON objects into spreadsheet-ready CSV, using object keys as the header row and quoting any value that contains a comma, quote or newline. It runs entirely in your browser, so your data never leaves the page.

Last updated · Free, no signup

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How does JSON-to-CSV conversion work?

JSON-to-CSV conversion maps an array of objects onto a flat table: object keys become column headers and each object becomes a row. The converter takes the union of available keys and applies CSV quoting to values containing commas, quotes, or line breaks so the result can be opened in spreadsheet software.

PapaParse performs the conversion in the browser using RFC 4180 escaping rules. CSV cannot preserve every JSON distinction: nested structures need flattening, and an empty string, null, and a missing key can all become an empty cell. Long numeric identifiers may also need to be imported as text in Excel.