JSON to CSV Converter

An array of objects, like [{"name":"Ada","age":30}]. Each object's keys become CSV columns, if different objects have different keys, every key seen across the array becomes a column, filled in as empty for rows missing that key.

Nested values are stringified as JSON text inside that cell rather than causing an error, so the conversion never crashes, though for a fully flat CSV you'll generally want to flatten nested data before converting.

Any cell containing a comma, quote or newline is automatically wrapped in double quotes, with internal quotes escaped by doubling them, following standard CSV quoting rules so the file opens correctly in Excel, Google Sheets or Numbers.