> ## Documentation Index
> Fetch the complete documentation index at: https://docs.qu.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# encodeBase64

```ts theme={null}
function encodeBase64(data): string
```

Encodes `data` as a base-64 encoded string.

## Parameters

| Parameter | Type                                               | Description         |
| :-------- | :------------------------------------------------- | :------------------ |
| `data`    | [`BytesLike`](/sdk/content/type-aliases/BytesLike) | The data to encode. |

## Returns

`string`

The base-64 encoded string.

## Example

```ts theme={null}
// Encoding binary data as a hexstring
encodeBase64('0x1234');

// Encoding binary data as a Uint8Array
encodeBase64(new Uint8Array([0x12, 0x34]));

// The input MUST be data...
encodeBase64('Hello World!!');

// ...use toUtf8Bytes for this.
encodeBase64(toUtf8Bytes('Hello World!!'));
```

## Source

[encoding/base64.ts:57](https://github.com/dominant-strategies/quais.js/blob/c1c12d43f9d34c6baad2b0542bd6d0acd6fefcbf/src/encoding/base64.ts#L57)