@aws-js-sdk-v3-prerelease/util-base64-browser
A pure JS Base64 <-> UInt8Array converter
Usage no npm install needed!
<script type="module">
import awsJsSdkV3PrereleaseUtilBase64Browser from 'https://cdn.skypack.dev/@aws-js-sdk-v3-prerelease/util-base64-browser';
</script>