QR (Quick Response) codes are two-dimensional barcodes that can be read by smartphones and other mobile devices using a QR code reader app.  Here, we will learn to create a fully functional QR Code Generator using HTML, CSS, and JavaScript only.

Introduction

QR Code

To follow along with this tutorial, you should have a basic understanding of HTML, CSS, and JavaScript.  You will also need a web browser and a text editor. We will be using Visual Studio Code.

Prerequisites

Tools & Languages

First, create a new HTML file named index.html and add write the code. HTML file will include an input box to take user input, a generate button to generate the QR code. Click here for detailed instructions with the HTML code.

Step 1:

Set up the HTML File

Next, let's add some styles to the HTML using CSS. Create the style.css file and add a little bit of mass to your HTML skeleton. We'll use flexbox to center the elements and add some basic styles to the input field and button.  Click here for detailed instructions with the code.

Step 2:

Set up the CSS File

Now, we'll create a JavaScript file that will generate the QR code based on the user's input. We'll use a third-party library called qrcode.js to generate the QR code. You can use the library by downloading it on your code base or using a CDN also. Click here to get detailed instructions, JavaScript code & downloading link.

Step 3:

Now, JavaScript File

We can test the QR code generator by opening the HTML file in a web browser. – Enter some text in the input field. – Click the generate button. – The QR code should be displayed in the canvas element, and the download link should be visible. – Click the download link to download the QR code as a PNG image.

Step 4:

Testing the QR Code Generator

In this tutorial, we learned how to create a QR code generator using JavaScript, HTML, and CSS.  We used the qrcode.js library to generate the QR code and added a download link for the user to download the QR code as an image file. 

Conclusion

Final Words

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