---
title: "base64EncodedString(options:)"
framework: foundation
role: symbol
role_heading: Instance Method
path: "foundation/data/base64encodedstring(options:)"
---

# 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

Return Value The Base-64 encoded string.

## See Also

### Base-64 Encoding

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