By Vishal Basumatary in javascript — Mar 24, 2023

javascript terminal base64 encoder

JavaScript Terminal Base64 Encoder

As a web developer, I have come across several situations where I needed to encode or decode data in Base64 format using JavaScript. However, sometimes it's not possible to use an online tool or a library to get the job done. In such cases, I have found a terminal-based solution to be useful.

Using Node.js

One of the easiest ways to encode or decode data in Base64 format using JavaScript is by using Node.js. Here's how you can do it:

Install Node.js on your system if you haven't already.
Open your terminal and navigate to the directory where your file is located.
Create a new file and name it "base64.js".
Copy the following code into your "base64.js" file:

const base64 = require('base-64');
const utf8 = require('utf8');

const input = 'Hello, world!';

// encode data in Base64 format
const encodedData = base64.encode(utf8.encode(input));
console.log(encodedData);

// decode data from Base64 format
const decodedData = utf8.decode(base64.decode(encodedData));
console.log(decodedData);

Save the file and run it using the following command: node base64.js
You should see the encoded and decoded data printed in the console.

Using the Browser Console

If you don't want to use Node.js, you can also encode or decode data in Base64 format using the browser console. Here's how:

Open your web browser and navigate to the page where you want to encode or decode data in Base64 format.
Open the browser console by pressing F12 or Ctrl+Shift+I.
Type the following code in the console:

const input = 'Hello, world!';

// encode data in Base64 format
const encodedData = btoa(input);
console.log(encodedData);

// decode data from Base64 format
const decodedData = atob(encodedData);
console.log(decodedData);

Press Enter to run the code.
You should see the encoded and decoded data printed in the console.

Conclusion

Encoding or decoding data in Base64 format using JavaScript is easy and can be done in several ways. Whether you prefer using Node.js or the browser console, you can get the job done quickly and efficiently.