JSON to CSV Converter

CSV (Comma-Separated Values) is the lingua franca of tabular data — spreadsheets, BI tools, and data pipelines all consume it. JSON, by contrast, is tree-structured. Converting from JSON to CSV requires picking a "flat" shape: typically an array of objects where each object becomes one row and each key becomes one column.

This converter uses PapaParse to perform the CSV serialisation. It inspects every object in your array to build the union of all keys, so rows with missing fields produce empty cells instead of misaligning columns. RFC 4280 escaping is applied automatically: values with commas, quotes, or newlines get wrapped in double quotes.

If your JSON has nested objects or arrays, the default behaviour is to embed them as JSON strings in a single cell. Most spreadsheet tools import these cleanly, but if you need flat columns you should flatten the structure first — for example, by mapping `user.name` to a top-level `user_name` key. Empty arrays or objects at the top level produce an empty CSV with just a header line, or nothing at all.