JSON flattener
Nested ⇄ dot-notation key paths
Flatten deeply nested JSON into dot-notation key paths — perfect for spreadsheets, diffs and config files — or unflatten paths back into a nested structure.
How it works
- Open the tool and add your file (or paste your text).
- Adjust the options — everything previews instantly.
- Download the result. Done.
Private by design
This tool runs 100% in your browser. Your files are never uploaded to a server, never stored, and never seen by anyone — close the tab and nothing remains.
Free, no limits
No account, no watermarks, no daily caps. If you also need full design tools, the Ijodly editor is one click away.
Frequently asked questions
Is JSON flattener free to use?
Yes — JSON flattener is completely free. There is no account to create, no watermark on your results and no daily limits.
Are my files uploaded when I use JSON flattener?
No. JSON flattener runs entirely in your browser. Your files never leave your device and nothing is stored on a server — close the tab and nothing remains.
Do I need to install anything or sign up?
Neither. Open the page, use JSON flattener straight away and download your result. No install, no signup.