/›json-path-extractor›json-flatten-tool

JSON Flatten Tool Online

Nested JSON is hard to import into flat tools like spreadsheets or SQL. This flattener turns every nested value into a single key such as user.address.city, producing a plain object you can convert to CSV or inspect quickly.

Runs in your browser — your text is never uploaded or stored.

Nested JSON

Flattened JSON

{
  "user.name": "Ada",
  "user.address.city": "London",
  "active": true
}

How to Use

1.Paste your nested JSON object or array.
2.Review the flattened dot-notation output.
3.Copy it into a CSV converter or analysis tool.

FAQ

Does it flatten arrays?

Array items become keys with numeric indexes, such as items.0.name.

Can I unflatten back?

Use the JSON Path Extractor or the full JSON tools to work with the original structure.

Need more options?

JSON Path Extractor & Flattener

Extract values from nested JSON with a JSONPath-style query, or flatten the whole object into dot-notation key/value pairs. Free and 100% browser-based.