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What is QR Code – History, Components, How to Create for Free

QR codes, also known as Quick Response codes, have emerged as powerful tools in the digital age, facilitating seamless information exchange and bridging the gap between physical and digital realms. These pixelated patterns, resembling modern-day hieroglyphics, encode vast amounts of data that can be effortlessly scanned and decoded using smartphones or dedicated QRcode readers. In this Post We will discuss QR Code, its history, components, How to Create a QR code, its applications, advantages and disadvantages.

What is a QR Code?

The Quick Representation Codes comes to you in a two-dimensional barcode, which you use to procure quick access to information and websites or perform different actions using a smartphone or a QR code reader. They attained popularity because of their proven versatility and their simplicity. Many commercial establishments use QR codes to receive customer payments.

What is QR Code
What are QR Codes

History of QR Code

Masahiro Hara, the leader of the Japanese Company Denso Wave, invented the QR code system in 1994. Denso Wave is a subsidiary of Toyota. The use of QR codes began with tracking vehicles at the time of manufacturing them. However, owing to their sizeable data-storing capacity, QR codes became popular.

QR Code
Sample QRcode

How to Create QR Code?

Can you create personalized QR codes? Yes, but it will help if you consider specific aspects like the amount of information and the QR Code’s size. Here are the guidelines for creating your QR codes.

1. Determine the Information That You Wish to Encode

Decide on the information that you want your Quick Response code to contain, which may be URL, text, contact details, WI-FI network credentials, or any other supported data type.

Information Within <yoastmark class=

2. Select a QR Code Generator

You will find many online QR code generator that enables you to create a QR code for free. However, you must select the URL that suits your needs.

Select <yoastmark class=


3. Select the QR Code Type and Customize the Design

When selecting a plan, you will get different QR code types like URL, text, email, and others with an option to customize the appearance like alteration of color, inserting a logo or an image overlay, and size adjustment.

4. Enter Your Details

Furnish the information you wish to encode into the QR code. Enter the URL or text QR code, whichever you want to encode.

Enter Your Details
Enter Your Details

5. Generate & Download the QR code

Hit on Generate or Create button after entering the information and personalizing your design. The QR Code gets generated in JPG, GIF, or PNG, depending on the selected format.

6. Test and Use the QR Code

Testing is the last step after downloading. Test it with a QR code scanner or smartphone camera to check whether it scans correctly. 

What are the Components of a QR Code?

Though the appearance of QR codes could be random and customizable, they are a slightly different mechanism and always have a square shape. QR codes contain seven elements.

Components of QR Code
Components of QR Codes

Position Marking

Position marking refers to printing a QR code in a specific direction, which enables you to scan the codes even if you hold the camera at different angles.

Alignment Marking

It helps in image orientation for large QR codes or on a billboard.

Timing Pattern

It helps the QRcode scanner find the length of the data matrix in the QR code.

Quiet Zone

It is the most vital component of the QR Code that enables the users to differentiate the codes from the surroundings through the QRcode scanner.

Version Information

The QR codes have 40 versions, known as markers which specify the one you have used. 1 to 7 are the common ones.

Format Information

It contains the relevant information on error tolerance, responsible for easy code scanning.

Data & Error Correction Module

The primary component of a QR code contains black and white modules, where you will find the data stored in a coded form. When you open the QRscanner, the surrounding blank space allows up to 30% codes damage.

How does a QR Code Work?

There is a similarity in the functionality of the QR Code to that of a supermarket’s barcode. The Quick Response code features black squares and dots, ports that reproduce different information. On scanning them with a smartphone, the pattern on the barcode does the same job as that of a compiler in the computer, responsible for translating into human-readable data within a few seconds.

Applications of QR Code

Quick Response codes have multiple applications, such as time and product tracking, recognizing the items and documents for linking content. It also has the potential to access control solutions to enable enter QRcode scanning. The QR codes are applied in the areas like:

Directing Customers to a Landing Page

Quick Response Codes enable customers to visit your page only by scanning them with a smartphone. Today, it is one of the proven and effective marketing techniques.

Scan Using QR Code
Directing to a URL using QR Codes

Advertising & Promotion

QR codes also allow you to engage consumers in marketing campaigns, leading the end-users to promotional websites, social media pages, or online coupons.

Advertisement using QR Codes

Adding Locations for Home, Shop, Office, and Other Places

The individuals can add multiple locations like shop, office, home, or other sites to a QR code to provide easy access to navigation.

Scanning for Places
Scanning for Places using QR Codes

Easy Payments

They are now a part of mobile payments across the globe. The users must only scan a QR code to make a direct and cashless payment from their smartphones.

Payment Using QR Codes
Payment Using QR Codes

Event Management

In event management, the QR codes prove useful for ticketing and registration purposes. The attendees can scan their tickets for an instant check-in.

Event Management Using Barcode
Event Management Using QR Codes

What are the Advantages of QR codes?

The various advantages are as follows:

Small Size

They occupy minimal space on your ad banner, brochure, pamphlet, product, or other places, wherever you want to use them because of the small size.

Simple Scanning

A mobile camera is sufficient for scanning QR Codes as they are quick and straightforward.

Large Data Storing Capacity

QR Codes are highly versatile as they can store various types of data like text, URLs, contact information, images, and videos. They can keep upto 7,089 digits.

Works Even in a Damaged Condition

When you print a Quick Response code on a paper or a wrapper, there is a possibility of minor damage, which does not affect the readability of the code.


QR Codes generation comes to you cheaply and can get printed on many surfaces, making it cheaper to share marketing information.

What are the Disadvantages of QR Codes?

The various disadvantages are as follows:

Highly Dependent on Smartphones

QR Codes will not function without smartphones and an internet connection, which limits your accessibility when you are at a place with poor connectivity. Also, when your phone battery gets low to the point of getting switched off, it causes inconvenience.

Privacy and Security Concerns

As the users get direct access to websites or apps, it would not guarantee security on the confidential information you might have stored. Hence, you must be cautious and ensure your data goes to trusted sources before scanning.


Though QR codes attained familiarity, not all users will know how to use them or would be reluctant to use them because of security issues.


Many diverse applications are discovered in QR codes as they are easy to use and versatile. They have specific pros like convenience and affordability, while privacy concerns and technology dependence are the concerns. QR codes have become ubiquitous, finding their way into various aspects of our lives. They effortlessly connect users to a wealth of information, from websites and promotions to exclusive offers and interactive experiences.

With a simple scan, QR codes unlock a world of possibilities, enabling users to access content instantly and conveniently. Their integration into mobile devices has made them even more accessible, transforming everyday objects, advertisements, and product packaging into interactive gateways to digital content. However, QR Code can include advanced technology like augmented reality and essential security in the future.

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Kavitha Ramnarayan
Kavitha Ramnarayan
Kavitha is a commerce graduate who has drastically moved to Information Technology. Among all skillsets & experiences, writing is one of her strengths. She began writing as a freelancer & acquired three years of experience in content writing, and got the Rewards & Recognition award in that domain. Her total years of writing experience is seven.


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