Is JSON Flattener / Unflattener free?

Yes, JSON Flattener / Unflattener is completely free to use with no signup required.

Does JSON Flattener / Unflattener send my data to a server?

No. JSON Flattener / Unflattener runs entirely in your browser using client-side JavaScript. Your data never leaves your device.

Flatten nested objects to flat maps or convert dot-separated objects to nested structures client-side.

DevTab

Never leaves your browser

Flatten nested JSON object fields or unflatten dot-separated structures back to nested maps client-side.

Original JSON Input

Processed Result JSON

Flattening CompiledSeparator: . | Mode: FLATTEN