# Rename a Key

Renames a key within a record.

## Example

This example shows how to use the RenameKey transformation to rename a key in a record.

```json
{
	"operation": "rename_key",
	"arguments": {
		"key": "old_key",
		"new_key": "new_key"
	}
}
```

Given the input record:

```json
{
	"old_key": "value",
	"another_field": "another_value"
}
```

The output record will be:

```json
{
	"new_key": "value",
	"another_field": "another_value"
}
```

If the key does not exist:

Given the input record:

```json
{
	"another_field": "another_value"
}
```

The output record will be unchanged:

```json
{
	"another_field": "another_value"
}
```