---
title: Unicode.UTF8
framework: swift
role: symbol
role_heading: Enumeration
path: swift/unicode/utf8
---

# Unicode.UTF8

## Declaration

```swift
@frozen enum UTF8
```

## Topics

### Structures

- [Unicode.UTF8.ForwardParser](swift/unicode/utf8/forwardparser.md)
- [Unicode.UTF8.ReverseParser](swift/unicode/utf8/reverseparser.md)
- [Unicode.UTF8.ValidationError](swift/unicode/utf8/validationerror.md)

### Type Aliases

- [Unicode.UTF8.CodeUnit](swift/unicode/utf8/codeunit.md)
- [Unicode.UTF8.EncodedScalar](swift/unicode/utf8/encodedscalar.md)

### Type Properties

- [encodedReplacementCharacter](swift/unicode/utf8/encodedreplacementcharacter.md)

### Type Methods

- [decode(_:)](swift/unicode/utf8/decode(_:)-swift.type.method.md)
- [encode(_:)](swift/unicode/utf8/encode(_:).md)
- [isASCII(_:)](swift/unicode/utf8/isascii(_:).md)
- [isContinuation(_:)](swift/unicode/utf8/iscontinuation(_:).md)
- [transcode(_:from:)](swift/unicode/utf8/transcode(_:from:).md)
- [width(_:)](swift/unicode/utf8/width(_:).md)

### Default Implementations

- [UnicodeCodec Implementations](swift/unicode/utf8/unicodecodec-implementations.md)

## Relationships

### Conforms To

- [BitwiseCopyable](swift/bitwisecopyable.md)
- [Copyable](swift/copyable.md)
- [Escapable](swift/escapable.md)
- [Sendable](swift/sendable.md)
- [SendableMetatype](swift/sendablemetatype.md)
- [UnicodeCodec](swift/unicodecodec.md)

## See Also

### Unicode Codecs

- [UnicodeCodec](swift/unicodecodec.md)
- [Unicode.ASCII](swift/unicode/ascii.md)
- [Unicode.UTF16](swift/unicode/utf16.md)
- [Unicode.UTF32](swift/unicode/utf32.md)
- [UnicodeDecodingResult](swift/unicodedecodingresult.md)
- [Unicode.ParseResult](swift/unicode/parseresult.md)