Node.js - encoding / decoding base64

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In this short article, we would like to show how to encode text to base64 and back (decode base64) in Node.js.


In the presented solution, we use the Buffer class, which has a global scope in Node.js and does not need to be imported using the require.

const Base64 = {
    encode: (text) => {
        const buffer = Buffer.from(text, 'binary');
        return buffer.toString('base64');
    decode: (base64) => {
        const buffer = Buffer.from(base64, 'base64');
        return buffer.toString('binary');

// Example:

console.log(Base64.encode('This is text...'));      // VGhpcyBpcyB0ZXh0Li4u
console.log(Base64.decode('VGhpcyBpcyB0ZXh0Li4u')); // This is text...

See also:

  1. JavaScript - base64 with Unicode support
  2. Node.js - atob / btoa functions equivalents
  3. Node.js - base64 with Unicode support

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Node.js - base64

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