What Is a QR Code? A Guide to Understand Them


You see them on posters, flyers, business cards, milk cartons: squares with confusing patterns that are supposed to provide additional information – but that is exactly what remains hidden for the time being. And it stays that way even if you don’t have a smartphone with which you can decrypt the code again – although the encrypted information can be exciting and useful for the user.

QR codes in many places and for many mobile and computer programs. Therefore, it should come as no surprise that QR codes are also used in casinos with modern casinos casino games and there are many ways online casinos use them.


QR codes store information. QR is the abbreviation for “Quick Response”. This means that information is presented in such a way that it can be accessed quickly and easily. Barcodes or barcodes at the supermarket checkout work on the same principle: The scanner “reads” from the strips which product it is and passes this information on to the checkout system.

By the way, in Korea, there is even a very unusual supermarket that has no products on the shelves. Instead, there are pictures of real shelves with the same fake products on the pillars and walls. A man walks between these shelves, chooses what he needs, scans the QR code and that’s it. On the way out, he scans the QR code to pay and gives his address for home delivery. This is further proof that QR codes are necessary for us to be able to communicate with the computer in the same language.


How does a QR code work? And in which areas can QR codes be used? There are many questions about this, let’s take a look at some aspects of it.

How reliable and secure is a QR code?

QR codes are designed to keep the information readable even when partially destroyed or obscured. With the highest level of security, the codes can be read even if up to a third of them have become unreadable.


Although the QR code is registered as a trademark of the originator (DENSO Corporation), the technology itself is royalty-free and is described in an ISO standard. What’s interesting is that the code was originally developed for the automotive industry, but gradually went beyond that. The real breakthrough in the minds of consumers came with the appearance of smartphones with a good camera in wide availability.

How does QR code work?

QR codes come in different versions and have different sizes depending on their size. From 21 x 21 pixels without borders in the first version to 177 x 177 pixels in the fortieth version. There are 4 main types of encodings. Among them are numeric (for encoding numbers), alphanumeric (numbers and symbols), byte (data) and kanji, designed to work with hieroglyphs.


A standard QR code can contain up to 4,000 characters. This allows you to encode not just a few dozen characters of a store’s inventory number, but entire texts, long referral links, and more. It is even possible to encrypt JPEGs, GIFs and PNGs.

Where QR codes are used

Depending on the application, static and dynamic QR codes are used. The static ones contain information that cannot be edited after the code is created. They are suitable for personal use, e.g. For example, to set up a WiFi connection or to create business cards, employee identification, event symbols, technical product documentation, etc.


In the case of a dynamic QR code, the information can be updated, edited and the type of code can be changed even after it is created. Codes of this type are more suitable for business and marketing purposes. With the help of QR codes it is possible to collect and measure the statistics of each scan within the advertising campaign.

Is it possible to create a QR code?

Nowadays there is probably nothing easier than creating a QR code. For this, there are many services and sites that allow you to quickly and without registration generate and download the necessary code to print it or send it to someone. There is no point in giving many examples, it is enough to just type “QR code generator” and get the desired result as a website or application.


How do I scan a QR code?

You can use a QR code using a smartphone or tablet and an app that scans and then processes the code. All you have to do is point your camera at the QR code and take a picture of the code.

If you want to integrate the saved QR code into an e-mail, simply copy the corresponding image file and attach it either to the body text or as a separate attachment. The same applies to your website. Treat the generated QR code as a normal image file and you can insert it into any text at any time using the image upload function. For example, if you want to print the code on a flyer, simply add the image file to the flyer in your layout program and you’re done.



In summary, QR codes are an important part of our everyday life, they make our life easier and more dynamic. It can sometimes be a very convenient way to share information.