📋 JSON Flatten & Unflatten

What is JSON Flattening?

JSON flattening converts nested objects into a flat structure using dot notation. For example, {"user": {"name": "John"}} becomes {"user.name": "John"}.

Examples

{
  "user": {
    "name": "John",
    "address": {
      "city": "NYC"
    }
  }
}

{
  "user.name": "John",
  "user.address.city": "NYC"
}

Use Cases

• CSV/Excel export — Flat JSON converts cleanly to tabular formats
• Analytics — Many analytics tools prefer flat data
• Search indexing — Elasticsearch and similar tools index flat structures better
• Form data — HTML forms naturally produce flat key-value pairs
• NoSQL databases — Some NoSQL stores work better with flat documents