JSON ↔ CSV.

Convert a JSON array of objects to CSV, or CSV back to JSON — with correct quoting for commas, quotes, and newlines (the part hand-rolled CSV always gets wrong). Two-way, all in your browser.

The format every spreadsheet speaks

JSON is how services talk to each other; CSV is how humans and spreadsheets look at data. Moving between them sounds trivial until a value contains a comma or a line break and a naive split shreds the whole file. Correct CSV quoting — doubling internal quotes, wrapping fields that need it — is a small standard (RFC 4180) that most quick scripts skip, which is why imports mysteriously break. This handles it both directions.