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JSON Flattener

JSON Flattener – Flatten or Unflatten Nested JSON Objects

Convert nested JSON into flat key-value pairs or restore structure with configurable delimiters for configs, logs, or CSV integration.

🟢 Runs locally · no uploads

Input JSON

{
  "user": {
    "name": "John",
    "email": "john@example.com"
  }
}

Flattened

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Flatten nested JSON objects to flat key-value pairs or unflatten back to nested structure with customizable delimiters and array handling