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Node.js - Base64 encode and decode

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Created by:

Majid-Hajibaba

972

In this article, we would like to show you how to encode and decode Base64 in JavaScript under Node.js.

Quick solution:

xxxxxxxxxx
 
const text = 'some text...';
​
const encoded = Buffer.from(text, 'utf8').toString('base64');
console.log('Encoded text: ' + encoded); // c29tZSB0ZXh0Li4u
​
const decoded = Buffer.from(encoded, 'base64').toString('utf8');
console.log('Decoded text: ' + decoded); // some text...

1. Encode

Edit

In this example, we create a Base64-encoded ASCII string using Buffer.from() with toString() method.

xxxxxxxxxx
 
const text = 'some text...';
const encoded = Buffer.from(text, 'utf8').toString('base64');
​
console.log('Encoded text: ' + encoded); // c29tZSB0ZXh0Li4u

Output:

xxxxxxxxxx
 
c29tZSB0ZXh0Li4u

2. Decode

Edit

In this example, we decode a string of data that has been encoded using Base64 encoding.

xxxxxxxxxx
 
const encoded = 'c29tZSB0ZXh0Li4u';
const decoded= Buffer.from(encoded, 'base64').toString('utf8');
​
console.log('Decoded text: ' + decoded); // some text...