Base64 encoding/decoding in pure JS

npm install base64-js
7 031 downloads in the last day
34 252 downloads in the last week
156 371 downloads in the last month


base64-js does basic base64 encoding/decoding in pure JS.

build status

testling badge

Many browsers already have base64 encoding/decoding functionality, but it is for text data, not all-purpose binary data.

Sometimes encoding/decoding binary data in the browser is useful, and that is what this module does.


With npm do:

npm install base64-js


var base64 = require('base64-js')

base64 has two exposed functions, toByteArray and fromByteArray, which both take a single argument.

  • toByteArray - Takes a base64 string and returns a byte array
  • fromByteArray - Takes a byte array and returns a base64 string



npm loves you