CSV ↔ JSON Converter
Convert CSV to JSON and JSON to CSV instantly. Auto-detect delimiters, download results. 100% client-side.
Privacy: All conversion uses Papa Parse in your browser. No data is sent to any server. Your data stays private.
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Frequently Asked Questions
What delimiter does this tool support?
Papa Parse auto-detects the delimiter (comma, semicolon, tab, pipe). You can also manually select one in the advanced options.
What is a header row?
The first row of a CSV file that contains column names. When enabled, JSON output uses these names as keys. When disabled, the output is an array of arrays.
Can I convert nested JSON to CSV?
Flat JSON (array of objects) converts directly. Nested objects are stringified as JSON in the CSV cell. For deep nesting, flatten your JSON first.
Is my data secure?
Yes. All conversion happens in your browser using Papa Parse. No data is sent to any server.