Free CSV ↔ JSON converter
Paste CSV to get clean JSON, or switch direction to turn JSON into CSV. Quoted fields, embedded commas and numeric types are handled correctly. Everything runs locally in your browser.
How it works
A correct converter — not a naïve split on commas.
Drop CSV (or JSON) into the left box. The first CSV row is treated as the header.
CSV → JSON or JSON → CSV. Numbers are detected so JSON output is properly typed.
Grab the result with one click, or download it as a .json / .csv file.
Parsing is local — nothing is uploaded, so it is safe for confidential exports.
FAQ
Does this upload my data anywhere?
No. Conversion happens entirely in your browser with JavaScript, so your data never leaves your device — safe for sensitive files.
Does it handle commas and quotes inside fields?
Yes. The CSV parser follows RFC-4180 rules: fields wrapped in double quotes can contain commas, line breaks and escaped quotes.
Are numbers converted to real numbers?
When going CSV → JSON, values that look numeric become JSON numbers rather than strings, so the output is ready to use in code.
Can I convert JSON back to CSV?
Yes. Toggle to JSON → CSV. The tool collects every key across the array of objects into a header row and emits a proper CSV.
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