Reshape JSON. Convert formats. All in your browser.

Flatten, unflatten, rename keys, or convert between JSON and CSV — processed locally, nothing uploaded.

Delimiter

Array mode

Delimiter

Rename map

Applied recursively at every nesting level. Saved locally so you don't have to retype it.

Field delimiter

Rebuild nested keys

Input JSON

Result

🔒 Processed entirely in your browser. Nothing is sent to any server.