A safe Uint8Array to base64 string converter

^{Social Media Photo by Suzanne D. Williams on Unsplash}

Compatible with any binary data and every modern JS engine.

import {encode, decode} from 'uint8-to-base64';
// const {encode, decode} = require('uint8-to-base64');

const utf8Binary = new Uint8Array(anyArrayBuffer);

// encode converts Uint8Array instances to base64 strings
const encoded = encode(utf8Binary);

// it's just like any other string
console.log(encoded);

// decode converts base64 strings, encoded via this module,
// into their original Uint8Array representation
const decoded = decode(encoded);

console.assert(
  JSON.stringify([...utf8Binary]) ===
  JSON.stringify([...decoded]),
  'safe Uint8Array to utf-16 conversion'
);

Please note this module requires global atob and btoa in NodeJS < 16, polyfilled in old tests in here as such.

global.btoa = str => Buffer.from(str).toString('base64');
global.atob = str => Buffer.from(str, 'base64').toString();

Looking for a drop in module that converts into utf-16 strings instead? Check uint8-to-utf16 out!

WebReflection/uint8-to-base64

A safe Uint8Array to base64 string converter