About this tool
This converter handles the standard RFC 4180 CSV format: fields containing commas, double-quotes, or line breaks are enclosed in double-quotes, and any double-quote inside a field is escaped by doubling it. JSON → CSV uses the union of all keys from the first object for header ordering. CSV → JSON parses the first row as headers and converts each subsequent row into an object. Nested objects and arrays in JSON are serialized as strings in CSV: for deep structures, a format like JSON Lines may be more appropriate.