npm package: @stdlib/string-base-base64-to-uint8array
Description: Convert a Base64-encoded string to a Uint8Array.
Author: The Stdlib Authors
Latest version: 0.1.1

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# base64ToUint8Array

[![NPM version][npm-image]][npm-url] [![Build Status][test-image]][test-url] [![Coverage Status][coverage-image]][coverage-url] <!-- [![dependencies][dependencies-image]][dependencies-url] -->

> Convert a Base64-encoded string to a [Uint8Array][@stdlib/array/uint8].

<!-- Package usage documentation. -->

<section class="installation">

## Installation

```bash
npm install @stdlib/string-base-base64-to-uint8array
```

</section>

<section class="usage">

## Usage

<!-- eslint-disable stdlib/no-redeclare -->

```javascript
var base64ToUint8Array = require( '@stdlib/string-base-base64-to-uint8array' );
```

#### base64ToUint8Array( str )

Converts a base64-encoded string to a [Uint8Array][@stdlib/array/uint8].

```javascript
var string2buffer = require( '@stdlib/buffer-from-string' );

var str = string2buffer( 'Hello World!' ).toString( 'base64' );
// returns 'SGVsbG8gV29ybGQh'

var out = base64ToUint8Array( str );
// returns <Uint8Array>[ 72, 101, ... ]
```

</section>

<!-- /.usage -->

<section class="notes">

## Notes

-   The function returns `null` when provided a string containing non-ASCII characters.

</section>

<!-- /.notes -->

<!-- Package usage examples. -->

<section class="examples">

## Examples

```javascript
var string2buffer = require( '@stdlib/buffer-from-string' );
var base64ToUint8Array = require( '@stdlib/string-base-base64-to-uint8array' );

var buf = string2buffer( 'Hello World!' ).toString( 'base64' );
// returns 'SGVsbG8gV29ybGQh'

var arr = base64ToUint8Array( buf );
// returns <Uint8Array>

buf = string2buffer( 'HELLO WORLD!' ).toString( 'base64' );
// returns 'SEVMTE8gV09STEQh'

arr = base64ToUint8Array( buf );
// returns <Uint8Array>

buf = string2buffer( 'To be, or not to be: that is the question.' ).toString( 'base64' );
// returns 'VG8gYmUsIG9yIG5vdCB0byBiZTogdGhhdCBpcyB0aGUgcXVlc3Rpb24u'

arr = base64ToUint8Array( buf );
// returns <Uint8Array>
```

</section>

<!-- /.examples -->

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* * *

## Notice

This package is part of [stdlib][stdlib], a standard library for JavaScript and Node.js, with an emphasis on numerical and scientific computing. The library provides a collection of robust, high performance libraries for mathematics, statistics, streams, utilities, and more.

For more information on the project, filing bug reports and feature requests, and guidance on how to develop [stdlib][stdlib], see the main project [repository][stdlib].

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## License

See [LICENSE][stdlib-license].


## Copyright

Copyright &copy; 2016-2026. The Stdlib [Authors][stdlib-authors].

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[@stdlib/array/uint8]: https://www.npmjs.com/package/@stdlib/array-uint8

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