Online JSON Unflatten
UnflattenNestedDot NotationJSON
Unflatten dot-notation JSON back to nested structure, e.g. {"a.b":1} → {a:{b:1}}, auto-detects array indices with local processing.
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How to Use
- Paste the JSON data to process
- Choose options and run the operation
- Copy the restructured JSON result
- All processing runs locally in your browser; your code is never uploaded
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FAQ
What is JSON unflatten?
Restores dot-flattened keys to nested objects, e.g. {"a.b":1} → {a:{b:1}}, numeric segments become arrays.
How to unflatten?
Paste flattened JSON and click Unflatten.
How are arrays detected?
Pure numeric segments are treated as array indices, e.g. {"a.0":1} → {a:[1]}.
Will my data be uploaded?
No, all operations run locally.