Input JSON
Transformed JSON
{
"first_name": "John",
"last_name": "Doe",
"age": 30,
"email": "john.doe@example.com",
"address": {
"street": "123 Main St",
"city": "New York",
"state": "NY",
"postal_code": "10001"
},
"phones": [
{
"type": "home",
"number": "212-555-1234"
},
{
"type": "work",
"number": "646-555-5678"
}
]
}
Key Mappings
Original Key
New Key
6
Key Mappings
11
Keys Transformed
0.5
JSON Size (KB)
How It Works
Key Mapping
Specify original key names and what you want to rename them to.
Nested Objects
The tool automatically processes nested objects and arrays.
Non-Matching Keys
Keys without mapping rules remain unchanged in the output.