JSON Unflatten
Restore flattened JSON to a nested structure for easier reading, editing, and integration with other tools.
Frequently Asked Questions
What does JSON Unflatten do?
It takes a flattened JSON object and restores it to a nested structure, reversing the flattening process while preserving all values.
How do I unflatten JSON online?
Paste your flat JSON into the editor and click "Unflatten" to automatically rebuild the nested hierarchy in your browser.
Why would I want to unflatten JSON?
Unflattening helps when you need to work with structured JSON for APIs, configuration files, or when readability matters.
Can I unflatten large JSON objects?
Yes. The tool efficiently reconstructs large flattened JSON objects directly in your browser without uploading your data.
Does JSON Unflatten modify my data?
No. The tool only rebuilds the structure; all keys and values remain exactly as in the original flat JSON.
Can I copy the nested JSON after unflattening?
Yes. After unflattening, use the copy button to quickly copy the reconstructed nested JSON for use in your projects or APIs.