Flatten Nested JSON Online
Make nested JSON objects easier to scan or prepare them for tabular workflows. Parsily walks nested objects and combines their property names into dot-separated paths, producing flat JSON output in your browser.
Open the JSON flattenerHow to flatten JSON
- Paste valid JSON or select a local JSON file.
- Select Flatten Nested JSON.
- Review the result, then copy or download the flattened JSON.
Flattening behavior
Nested object properties are joined using periods—for example, user.address.city. Arrays are kept as JSON text rather than expanded into separate rows. If you need tabular output, use the JSON to CSV converter after reviewing your data shape.