JSON ↔ CSV Converter

FAQ

What JSON structure is supported?

The tool expects a JSON array of objects where every object shares the same keys. The first object's keys become the CSV header row, and each subsequent object becomes a data row. Nested objects and arrays are not expanded — they are stringified directly. If your JSON is not a flat array of uniform objects, normalize it before converting.

How are CSV values with commas handled?

Values that contain a comma, a double quote, or a line break are automatically wrapped in double quotes when exporting to CSV. Any double quote inside a value is escaped by doubling it (" → ""). This follows the RFC 4180 standard, ensuring the output is compatible with Excel, Google Sheets, and all major data tools.

About JSON CSV Converter

The JSON ↔ CSV Converter lets you switch between two of the most common data formats with a single click. JSON to CSV extracts the keys of the first object as headers and maps every object's values into rows. CSV to JSON reads the header row as object keys and parses each data row into a JSON object. RFC 4180 quoting is applied automatically. All processing runs locally in your browser — no file is ever uploaded.