Online JSON Flatten
FlattenDot NotationNestedJSON
Flatten nested JSON to dot notation instantly, e.g. {a:{b:1}} → {"a.b":1}, with array index support and 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 flatten?
Expands nested objects to dot-notation single-level keys, e.g. {a:{b:1}} → {"a.b":1}, arrays as a.0, a.1.
How to use flatten?
Paste nested JSON and click Flatten to see dotted result.
Does it support arrays?
Yes, arrays expand by dot index, e.g. {arr:[1,2]} → {"arr.0":1,"arr.1":2}.
Will my data be uploaded?
No, all operations run locally in your browser.