Free Developer Tool
JSON Field Renamer
Rename one or multiple JSON field names while preserving the original data structure.
What is JSON Field Renamer?
The JSON Field Renamer lets you rename keys throughout a JSON document without manually editing every occurrence. It's useful when updating APIs, configuration files or datasets.
How to use
- Paste or upload JSON.
- Specify the field to rename.
- Enter the new field name.
- Copy the updated JSON.
Features
- Rename nested keys
- Bulk field renaming
- Instant preview
- Valid JSON output
Common Use Cases
- Updating API field names
- Standardizing datasets
- Refactoring JSON structures
- Preparing migration data
Example
Input
{
"username":"john"
}Output
{
"name":"john"
}FAQ
Can nested field names be renamed?
Yes. Fields inside nested objects and arrays are supported.
Does it modify values?
No. Only field names are changed.
Is the output valid JSON?
Yes. The generated document remains valid JSON.
Missing a feature?
If this tool doesn't cover your use case or is missing functionality, please let me know through the Contact page.
New improvements and features are added based on user feedback.