This tool converts a JSON array of objects to RFC 4180 CSV format. Column headers are automatically derived from all unique keys across the objects. Fields containing commas, quotes, or newlines are properly quoted. Supports nested values as stringified JSON. Runs entirely in your browser.
JSON to CSV Converter: flatten JSON arrays of objects into structured tables instantly. This data flattening tool uses a key-union header strategy to ensure heterogeneous arrays map cleanly to a json to spreadsheet format. It is a vital tool for developers who need to export browser-side CSV files for import into Excel or Google Sheets without uploading sensitive payloads.
Our JSON to CSV Converter handles complex nested object stringify tasks by converting structures into flat, round-trippable text cells. By applying strict rfc 4180 csv rules for double-quote escaping and embedded newline quoting, it simplifies the process of sanitizing API responses. This free online tool delivers technical precision, offering a reliable JSON array to CSV experience for data analysis and reporting.
The header row is the union of every key seen across the array, so missing fields just become empty cells. The order of the headers follows first-appearance order, which is usually what you want for diffs.
Per RFC 4180: any field containing a comma, double-quote or newline is wrapped in double-quotes, and any internal double-quote is escaped by doubling it (" becomes ""). That is the form Excel, Google Sheets and Postgres COPY all expect.
They are JSON-stringified into a single cell. CSV is intentionally flat, so nested structure is preserved as text - you can re-parse it later with JSON.parse if needed.
Yes. A single object is treated as a one-row array. If you have objects keyed by id, you may want to map them to an array first ([…Object.values(map)]) so the keys become a column.
Optimize your data management by using this JSON to CSV Converter for all your array flattening and spreadsheet export needs.
Bookmark this JSON to CSV Converter for the next time you need to flatten JSON data into a spreadsheet-ready file.