JSON to CSV / CSV to JSON

Select the "JSON to CSV" mode, paste your JSON array of objects into the input area, and the CSV output appears instantly. Each object key becomes a column header and each object becomes a row.

Yes. Nested objects are automatically flattened using dot notation. For example, an object with { "address": { "city": "Seoul" } } becomes a column named "address.city" with the value "Seoul".

You can choose between comma, tab, semicolon, or pipe as the delimiter. This is useful for generating TSV files or for compatibility with systems that use non-standard separators.

Yes! All processing happens entirely in your browser. Your data is never sent to any server. No data is collected, stored, or transmitted.

Yes. After conversion you can click the Download button to save the output as a .csv or .json file depending on the current conversion mode. You can also copy the result to your clipboard.