---
title: "base64EncodedString(options:)"
framework: Foundation
role: symbol
role_heading: Instance Method
platforms: [iOS 8.0+, iPadOS 8.0+, Mac Catalyst 8.0+, macOS 10.10+, tvOS 9.0+, visionOS 1.0+, watchOS 2.0+]
path: foundation/data/2142853-base64encodedstring
---

# base64EncodedString(options:)

Returns a Base-64 encoded string.

## Declaration

```swift
func base64EncodedString(options: Data.Base64EncodingOptions = []) -> String
```

## Parameters

- `options`: The options to use for the encoding. Default value is `[]`.

## Return Value

The Base-64 encoded string.

## See Also

### Base-64 Encoding

- [base64EncodedData(options:)](base64encodeddata(options:).md)
- [Data.Base64DecodingOptions](base64decodingoptions.md)
- [Data.Base64EncodingOptions](base64encodingoptions.md)