QR codes are now part of everyday life. From restaurant menus and payment systems to advertisements and boarding passes, these small black-and-white squares are everywhere. But despite their global use, one question often comes up: Why haven’t we “run out” of QR codes yet?

Axar.az informs that the answer lies in how they are designed, how they were created, and why they remain so useful in the digital age.

What are QR codes?

QR (Quick Response) codes are a type of barcode that stores information in a machine-readable format. Unlike traditional barcodes, which store data in one direction, QR codes store information both horizontally and vertically, allowing them to hold much more data.

They can contain:

- website links

- text

- payment details

- app downloads

- contact information

When scanned with a smartphone camera, the code instantly directs users to the stored information.

How were QR codes created?

QR codes were invented in 1994 by a Japanese company, Denso Wave, a subsidiary of Toyota. They were originally designed to track automotive parts more efficiently during manufacturing.

The goal was simple: create a code that could store more information and be scanned faster than traditional barcodes.

Unlike many technologies, QR codes were made available freely without licensing fees, which helped them spread globally.

Why are QR codes so popular now?

Although QR codes were created decades ago, their real global breakthrough came during the COVID-19 pandemic.

Reasons for their popularity include:

- contactless interaction (no physical touch needed)

- smartphone adoption worldwide

- fast access to digital content

- use in payments and online services

Today, QR codes are widely used in restaurants, transport systems, banking apps, and marketing campaigns.

Why haven’t we “run out” of QR codes?

There is no limit problem because QR codes are not a fixed set of combinations like simple numbers. Instead, they generate patterns based on encoded data.

Even small changes in data (a link, a number, a text string) create a completely different QR code. This means there are practically infinite combinations available.

Pros of QR codes

- very fast and easy to use

- no need for typing or manual input

- low cost to produce

- can store different types of data

- widely supported on smartphones

Cons of QR codes

- can be used for scams or fake links

- require a smartphone and internet access

- not always user-friendly for older people

- damaged or poorly printed codes may not scan

The future of QR codes

Despite newer technologies like NFC and biometric systems, QR codes are still growing. Their simplicity, low cost, and flexibility make them one of the most practical digital tools in the world today.

From payments to public services, QR codes are likely to remain a key part of everyday digital interaction for years to come.