QR Code Generator using HTML, CSS, and jQuery

In this article, we will understand how to create a QR Code Generator using HTML, CSS, and jQuery with the help of various examples.

What is a QR Code generator?

QR Code Generator is a tool that is used to generate different types of QR Codes depending on the purpose, as we can create QR Codes to open a website, view a PDF file, listen to music, watch Youtube videos, store image files, connect to a WiFi network, etc. To generate a QR code, we should know the type of content you are using.

Following are the various examples of QR Code Generator using HTML, CSS and jQuery

Example 1:

<! DOCTYPE html>
<html>
<head>
  <meta charset = "UTF-8">
  <meta name = "viewport" content = "width=device-width, initial-scale=1.0">
  <meta http-equiv = "X-UA-Compatible" content = "ie=edge">
  <title> Example of QR Code Generator </title>
<link rel = "stylesheet" href =
"https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.7/css/bootstrap.min.css" />
<style>
	.qr-code {
	max-width: 200px;
	margin: 10px;
	}
	body {
  background-color: #555;
  justify-content: center;
  font-family: 'VT323', monospace;
  font-size: 1.5rem;
 color: black;
  margin: 20px;
   text-align: center; 
}
h1 {
  font-weight: normal;
  font-size: 40px;
  font-weight: normal;
  text-transform: uppercase;
  text-align: center; 
}
h3 { 
text-align: center; 
color: #46a294; 
font-size: 20px; 
width: 100%;
margin: 15 15; 
position: relative; 
font-weight: 400; 
}
h2 { 
text-align: center; 
color: #46a294; 
font-size: 28px; 
width: 100%;
 margin: 10px 10; 
position: relative; 
line-height: 58px; 
font-weight: 400; 
}
h2:before { 
content: " "; 
position: absolute; 
left: 50%; 
bottom: 0; 
width: 100px; 
height: 2px;
font-weight: bold;
 background-color: #2079df; 
margin-left: -50px;
 }
button.center-block {
  margin-top: 20px;
  display: block;
  width: 60%;
  line-height: 2em;
  background: rgba(114,212,202,1);
  border-radius: 5px;
  border: 0;
  border-top: 1px solid #B2ECE6;
  box-shadow: 0 0 0 1px #46A294, 0 2px 2px #808389;
  color: #FFFFFF;
  font-size: 1.5em;
  text-align: center;
  text-shadow: 0 1px 2px #21756A;
}
button.center-block:hover {
 background: linear-gradient(to bottom, rgba(107,198,186,1) 0%,rgba(57,175,154,1) 100%);  
}
button.center-block:active {
  box-shadow: inset 0 0 5px #000;
  background: linear-gradient(to bottom, rgba(57,175,154,1) 0%,rgba(107,198,186,1) 100%); 
}
button.center-block:focus {
    outline: none;
    border-color: green;
}
</style>
</head>
<body>
<h1> Example </h1>
		<h2> QR Code Generator </h2>
<div class = "container-fluid">
	<div class = "text-center">
	<img src =
"https://chart.googleapis.com/chart?cht=qr&chl=Hello+World&chs=160x160&chld=L|0"
		class = "qr-code img-thumbnail img-responsive" />
	</div>
	<div class = "form-horizontal">
	<div class = "form-group">
		<label class = "control-label col-sm-2"
		for = "content">
		<h3> Content: </h3>
		</label>
		<div class = "col-sm-10">
		<input type = "text" size = "60"
			maxlength = "50" class = "form-control"
			id = "content" placeholder = "Enter content" />
		</div>
	</div>
	<div class = "form-group">
		<div class = "col-sm-offset-2 col-sm-10">
		<button type = "button" class =
			"center-block" id = "generate">
			Generate
		</button>
		</div>
	</div>
	</div>
</div>
<script src =
	"https://code.jquery.com/jquery-3.5.1.js">
</script>
<script>
	function htmlEncode(value) {
	return $('<div/>').text(value)
		.html();
	}
	$(function () {
	$('#generate').click(function () {		
		let finalURL =
'https://chart.googleapis.com/chart?cht=qr&chl=' +
		htmlEncode($('#content').val()) +
		'&chs=160x160&chld=L|0'	
		$('.qr-code').attr('src', finalURL);
	});
	});
</script>
</body>
</html>

Explanation:

In the above example, we have created a QR code by passing a value in the content box. We have generated a QR code with a defined value in the content box.

Output:

Following is the output of this example.

QR Code Generator using HTML, CSS, and jQuery

Example 2:

<! DOCTYPE html>
<html lang="en">
<head>
  <meta charset = "UTF-8">
  <meta name = "viewport" content = "width=device-width, initial-scale=1.0">
  <meta http-equiv = "X-UA-Compatible" content = "ie=edge">
  <link href = "https://fonts.googleapis.com/css?family=Major+Mono+Display" rel = "stylesheet">
  <link rel = "stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.1.3/css/bootstrap.min.css">
  <script src = "https://cdnjs.cloudflare.com/ajax/libs/qrcode-generator/1.4.1/qrcode.js"> </script>
  <script src = "https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"> </script>
  <script src = "https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.3/umd/popper.min.js"> </script>
  <link rel = "stylesheet" href = "https://use.fontawesome.com/releases/v5.6.1/css/all.css" integrity="sha384-gfdkjb5BdAXd+lj+gudLWI+BXq4IuLW5IT+brZEZsLFm++aCMlF1V92rMkPaX4PP" crossorigin = "anonymous">
  <script src = "https://cdnjs.cloudflare.com/ajax/libs/jquery.qrcode/1.0/jquery.qrcode.min.js"> </script>
  <script src = "https://maxcdn.bootstrapcdn.com/bootstrap/4.1.3/js/bootstrap.min.js"> </script>
  <title> QR generator Example </title>
</head>
<style>
  #placeHolder {
    display: none;
  }
button.center-block {
  margin-top: 20px;
  display: block;
  width: 60%;
  line-height: 2em;
  background: rgba(114,212,202,1);
  border-radius: 5px;
  border: 0;
  border-top: 1px solid #B2ECE6;
  box-shadow: 0 0 0 1px #46A294, 0 2px 2px #808389;
  color: #FFFFFF;
  font-size: 1.5em;
  text-align: center;
  text-shadow: 0 1px 2px #21756A;
}
button.center-block:hover {
 background: linear-gradient(to bottom, rgba(107,198,186,1) 0%,rgba(57,175,154,1) 100%);  
}
button.center-block:active {
  box-shadow: inset 0 0 5px #000;
  background: linear-gradient(to bottom, rgba(57,175,154,1) 0%,rgba(107,198,186,1) 100%); 
}
button.center-block:focus {
    outline: none;
    border-color: green;
}
  canvas {
width:200px;
  }
  #dBtn {
    display: none;
  }

  h1#heading {
    font-family: 'Major Mono Display', monospace;
  }
  body {
  background-color: #555;
  justify-content: center;
  font-family: 'VT323', monospace;
  font-size: 1.5rem;
 color: black;
  margin: 20px;
   text-align: center; 
}
h1 {
  font-weight: normal;
  font-size: 40px;
  font-weight: normal;
  text-transform: uppercase;
  text-align: center; 
}
h2 { 
text-align: center; 
color: #46a294; 
font-size: 28px; 
width: 100%;
 margin: 10px 10; 
position: relative; 
line-height: 58px; 
font-weight: 400; 
}
h2:before { 
content: " "; 
position: absolute; 
left: 50%; 
bottom: 0; 
width: 100px; 
height: 2px;
font-weight: bold;
 background-color: #2079df; 
margin-left: -50px;
 }
  </style>
<body>
 <h1> Example </h1>
		<h2> QR Code Generator </h2>
  <div class = "container mx-auto w-75 py-4 border my-4 bg-light">
      <label for = "usr" class = "text-dark"> Enter Text: </label>
      <input type = "text" class = "form-control" id = "text" name = "username" placeholder = "Enter Text Here">
      <a href = "javascript:void(0)" class = "btn btn-primary btn-lg my-4" onclick = "generate();"> Generate </a>
  </div>
  
  <div class = "jumbotron mx-auto w-75 border my-4 py-4 text-center" id = "dBtn">
      <div id = "placeHolder"> </div>   
      <canvas id = "myCanvas"> </canvas>
    <br>
      <a href = "#" class = "btn btn-danger btn-lg" onclick = "downloadQrCode(this);" download = "QRcode.png" > Download </a>
  </div>
  <nav class = "navbar navbar-expand-sm bg-dark navbar-dark fixed-bottom p-1 ">
     <ul class = "navbar-nav">
     <li class = "nav-item">
      <a class = "nav-link" href = "javascript:void(0)"> All Rights Reserved 2022 </a>
    </li>
       </ul>
    </nav>
	<script>
	function generate(){
  var typeNumber = 4;
  var errorCorrectionLevel = 'L';
  var qr = qrcode(typeNumber, errorCorrectionLevel);
  var inputText = document.getElementById('text').value;
  qr.addData(inputText);
  qr.make();
  document.getElementById('placeHolder').innerHTML = qr.createImgTag();
  canvasScreen();
}
downloadQrCode =function (el){
  var canvas = document.getElementById("myCanvas");
  var image = canvas.toDataURL("image/png");
  el.href = image;
};
function canvasScreen() {
  var a = document.getElementsByTagName("img")[0];
  a.setAttribute("id","qrcode");  
  var canvas = document.getElementById("myCanvas");
  var ctx = canvas.getContext("2d");
  var img = document.getElementById("qrcode");
  ctx.drawImage(img,70,0,150,150);
document.getElementById("dBtn").style.display = "block";
}
</script>
</body>
</html>

Explanation:

In the above example, we created a QR code by passing a value in the content box. With the use of defined value in the content box, we have generated a QR code, and after generating a QR code, we also have a downloading option. We can download a QR code as an image in your system. We can change the name of the image using the following code.

      <a href = "#" class = "btn btn-danger btn-lg" onclick = "downloadQrCode(this);" download = "QRcode.png" > Download </a>

Output:

Following is the output of this example.

Next TopicPhone Number Keyboard using HTML and jQuery

← prev next →

For Videos Join Our Youtube Channel: Join Now

Feedback

Send your Feedback to [email protected]

Help Others, Please Share

Learn Latest Tutorials

Splunk

SPSS

Swagger

Transact-SQL

Tumblr

ReactJS

Regex

Reinforcement Learning

R Programming

RxJS

React Native

Python Design Patterns

Python Pillow

Python Turtle

Keras

Preparation

Aptitude

Reasoning

Verbal Ability

Interview Questions

Company Questions

Trending Technologies

Artificial Intelligence

AWS

Selenium

Cloud Computing

Hadoop

ReactJS

Data Science

Angular 7

Blockchain

Git

Machine Learning

DevOps

B.Tech / MCA

DBMS

Data Structures

DAA

Operating System

Computer Network

Compiler Design

Computer Organization

Discrete Mathematics

Ethical Hacking

Computer Graphics

Software Engineering

Web Technology

Cyber Security

Automata

C Programming

C++

Java

.Net

Python

Programs

Control System

Data Mining

Data Warehouse

^{Like/Subscribe us for latest updates or newsletter}

jQuery Tutorial

jQuery Effects

jQuery HTML/CSS

jQuery Form

jQuery Events

jQuery Misc

jQuery Questions

Miscellaneous

jQuery MCQ

jQuery UI