QR Codes — Information In Black Squares

QR Codes are optical images that contain information that can be read by the imaging system that reads the black squares arranged in a certain pattern. This pattern is decoded by the Reed–Solomon error correction to interpret the message stored on it. The QR codes use various types of encoding modes like alphanumeric, numeric, kanji and binary systems. These codes have become popular because of its ease of use and great storage capacity. The applications of QR codes are numerous from simple product tracking and item identification to marketing and document management.


1.Payment methods: One of the most common everyday use of QR codes are in the supermarkets where these codes are used to identify an item and all related data to it making the billing process easier.

2.URLs: QR codes can be used to store URLs that can be easily scanned to visit the site. This eliminates the need to remember the URL and type it out every time you need to visit the site. This is used frequently in advertising industries, where the code can be used to easily direct the customer to the desired website — faster than typing out the URL of the site.

3.Mobiles: QR codes are used by mobiles most commonly as the imaging device which could interpret the code. It can now also be used to read the URL and redirect the search engine to the website, or the QR code could send metadata to the appropriate application installed on the mobile.

4.Virtual Stores: A concept started in Argentina and South Korea is now being adopted worldwide with Procter & Gamble, Woolworths, and Walmart leading the way. The QR stores are used for virtual stores, where the customer can scan the code from either the retail store or from their home.

5.Funerary: QR codes are being implemented on tombstones to enable the user to be redirected to a virtual grave site. Tombstones with QR codes were first used in Japan, by Ishinokoe in Yamanashi Prefecture in 2008. These QR codes were designed by IT DeSign. Now various others are adopting the concept, such as Wisconsin-based Interactive Headstones and the Jewish Cemetery of La Paz in Uruguay.

6.Video Games: The stories or game play elements can be incorporated as QR codes and this has been used in popular games like The Talos Principle and Fez.

7.Encryption: Though not very common yet, encrypted codes are used in immigration systems I Japan which checks for landing permission in the QR code of the immigration stamps. Also, an android app can handle the encryption and decryption of QR codes with the help of Data Encryption Standard algorithm.

QR Code Generator

QR code generators can be used to help you create your own QR codes. Here are quick steps that you follow to generate your own QR codes:

1.Select the QR code Generator: Choose the right QR code generator among the numerous options available.

Keep in mind these few checkpoints when choosing your QR code generator: The tracking and analyzing of performance, uniqueness, compatibility.

2.Design and link: You can easily customize the design of the QR code. For example, you can customize it to represent your brand logo.

3.Testing: Ensure that you check if the QR code is readable and it is showing the right data.

4.Track and Analyze: Track its usage and performance to determine the effectiveness.