About this tool
Each rule renames a key wherever it appears in the document, at any nesting depth — useful for converting between naming conventions (e.g. snake_case API responses to camelCase) without hand-editing every occurrence.
JSON Key Renamer
Rename JSON object keys everywhere they appear, at any nesting depth. Runs entirely in your browser.
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About JSON Key Renamer
JSON Key Renamer replaces specific object keys across JSON documents at any depth without modifying data values.
How to use JSON Key Renamer
- Paste JSON document into the input pane.
- Enter original key name to find and new key name to set.
- Click Rename Keys to perform global recursive key replacement.
- Copy updated JSON payload.
Examples
Original: {"user_id": 10, "details": {"user_id": 10}} Rename: user_id -> userId Result: {"userId": 10, "details": {"userId": 10}}
FAQ
Does renaming affect string values inside JSON properties?
No. Only object key names are renamed; string data values remain untouched.
Can I apply multiple key renaming rules at once?
Yes. You can define multiple search and replacement key mapping pairs.
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