Convert nested JSON objects into flat key-value pairs with this powerful JSON Flattener Tool. Perfect for APIs, data migration, spreadsheets, and simplifying complex structures.
This tool converts nested JSON objects into a flat structure with dot notation keys. For example, {"user": {"name": "John"}} becomes {"user.name": "John"}.
For more advanced JSON processing techniques, check out our JSON manipulation guide which covers various transformation scenarios.
JSON flattening is the process of converting nested JSON objects into a single-level structure with compound keys. This is particularly useful for:
Our flattener handles all JSON data types including strings, numbers, booleans, arrays, and nested objects. When working with arrays, you can choose whether to preserve them or flatten each element with index-based keys.
This tool is widely used by:
For more information about JSON standards and best practices, visit the official JSON website.
Turns deeply nested structures into a flat format with dot or bracket notation.
Choose between dot (.) or bracket ([]) style keys.
Flattened JSON is instantly copyable for use in Excel, APIs, or other tools.
Handles arrays and objects with repeated or nested keys.
Runs locally in your browser — no login, no uploads.