A JSON to CSV converter is a free online tool that turns a JSON array of objects into spreadsheet-ready CSV. Nested objects are flattened with dot-notation keys, fields containing commas or quotes are quoted correctly, and you can copy the result or download it as a .csv file.
How do I convert JSON to CSV online?
Paste a JSON array of objects and press Convert. Each object becomes one CSV row, keys become the header row, and nested objects are flattened with dot notation. Press Copy output or Download .csv to use the result in Excel or Google Sheets.
If your JSON is a single object instead of an array, the tool wraps it automatically. Values that are arrays (like tags) are kept as compact JSON strings so no data is lost in the conversion.
How are nested objects handled in the CSV?
Nested objects are flattened: {"address":{"city":"London"}} becomes a column named address.city. This keeps every value in its own column without inventing a custom format.
Keys are collected across all rows in first-seen order, so rows with different shapes still align: missing values become empty cells rather than shifting columns out of place.
Frequently asked questions
Is this JSON to CSV converter free?
Yes. Convert unlimited JSON with no account and no limits. It runs entirely in your browser.
What JSON format does it accept?
An array of objects is ideal. A single object is wrapped into a one-row table automatically. Anything else produces a clear error.
How are commas inside values handled?
Any value containing a comma, quote, or line break is wrapped in double quotes, with inner quotes doubled, per standard CSV rules.
What happens to nested arrays?
Arrays are serialized as compact JSON strings inside their cell, so ["x","y"] stays intact and readable.
Is my JSON uploaded anywhere?
No. Conversion happens locally in your browser. Your data never leaves your device.