Base64 Base64 compact library with atob and btoa. (Base64.js - 355 bytes) ES module for web and Deno sample app https://code4fukui.github.io/Base64/ usage import { Base64 } from "https://code4fukui.github.io/Base64/Base64.js"; console.log(Base64.encode(new Uint8Array([1, 2, 0xfe, 0xff]))); console.log(Base64.decode("AQL+/w=="));