JSON Flatten

Convert nested JSON to dot-path maps and unflatten back. Handy before CSV export.

All processing on this page runs locally in your browser unless noted otherwise.

Flatten Unflatten

Input

Result

Local offline processing — data is never uploaded

How to use

Example

{
  "user": {
    "name": "Ada",
    "profile": { "city": "Shanghai" }
  },
  "tags": ["json", "tools"]
}

Array indexes become numeric path segments such as items.0.name.

Yes for typical objects/arrays. Exotic key collisions may need manual review.