[API reference](https://evolu.dev/docs/api-reference) › [@evolu/common](https://evolu.dev/docs/api-reference/common) › [Type](https://evolu.dev/docs/api-reference/common/Type) › pascalCaseToSnakeCase

```ts
function pascalCaseToSnakeCase(
  value: string & Brand<"PascalCaseIdentifier">,
): string & Brand<"SnakeCaseIdentifier">;
```

Defined in: [packages/common/src/Type.ts:5863](https://github.com/evoluhq/evolu/blob/dd96d79f1dbe9a49fa12ce8e0aa7d3d0177795ca/packages/common/src/Type.ts#L5863)

Converts a [PascalCaseIdentifier](https://evolu.dev/docs/api-reference/common/Type/variables/PascalCaseIdentifier) to a [SnakeCaseIdentifier](https://evolu.dev/docs/api-reference/common/Type/variables/SnakeCaseIdentifier).

Converts `Http2Port` to `http2_port`. Use [snakeCaseToPascalCase](https://evolu.dev/docs/api-reference/common/Type/functions/snakeCaseToPascalCase) to
recover the original spelling.