---
title: "canonicalIdentifier(from:)"
framework: foundation
role: symbol
role_heading: Type Method
path: "foundation/locale/canonicalidentifier(from:)"
---

# canonicalIdentifier(from:)

Returns a canonical identifier from the given string.

## Declaration

```swift
static func canonicalIdentifier(from string: String) -> String
```

## See Also

### Converting between identifiers

- [components(fromIdentifier:)](foundation/locale/components(fromidentifier:).md)
- [identifier(fromComponents:)](foundation/locale/identifier(fromcomponents:).md)
- [identifier(_:from:)](foundation/locale/identifier(_:from:).md)
- [Locale.IdentifierType](foundation/locale/identifiertype.md)
- [canonicalLanguageIdentifier(from:)](foundation/locale/canonicallanguageidentifier(from:).md)
- [identifier(fromWindowsLocaleCode:)](foundation/locale/identifier(fromwindowslocalecode:).md)
- [windowsLocaleCode(fromIdentifier:)](foundation/locale/windowslocalecode(fromidentifier:).md)