Today we scan QR codes almost without thinking, but their story began more than three decades ago in a car parts factory in Japan. Knowing how the QR code was born and why it was designed the way it was helps you understand its strengths and get more out of it. In this article we look at the key moments in the history of the QR code.
The problem: barcodes were not enough
In the early 1990s, the Japanese car industry used barcodes to track parts on production lines. The problem was that a barcode only stores about 20 characters, and identifying each component took several codes. Workers had to scan up to ten codes per box, which slowed work down and caused errors.
1994: the QR code is born
Denso Wave, a subsidiary of the Denso group, a Toyota supplier, asked a team led by engineer Masahiro Hara to develop a code that could store much more information and be read at high speed. After a year and a half of work, in 1994 they presented the Quick Response Code.
Inspired by Go
According to Hara himself, the idea of a grid of black and white modules came to him while playing Go, the board game of black and white stones on a grid. A pattern like that could store information in two dimensions rather than one, like a barcode.
The three corner squares
The big challenge was for the reader to find the code quickly even when it was surrounded by text, drawings or other elements. The team analyzed thousands of leaflets, magazines and boxes to find a ratio of blocks that almost never appeared in printed material. The result was the 1:1:3:1:1 ratio of the finder patterns, the three corner squares that let scanners detect the code and its orientation from any angle.
A key decision: keeping it free
Denso Wave patented the QR code but chose not to exercise its rights, so anyone could use the format freely. That decision was crucial: companies all over the world could build scanners, generators and apps without paying license fees. In 2000 the QR code became an international standard (ISO/IEC 18004), ensuring any reader could interpret any code.
From the warehouse to the mobile phone
In the early 2000s, Japanese mobile phones began to include cameras and QR readers. Codes appeared in magazines, posters and ads to open web pages without typing long addresses on a phone keypad. Japan and South Korea led the way.
Elsewhere, adoption was slower. For years you needed a dedicated app to read the codes, which held their use back.
2017: the camera changes everything
The big leap came when manufacturers built QR reading into the system camera. Apple added it in iOS 11 in 2017, and Android followed with Google Lens and the cameras of the main manufacturers. From then on, scanning a code became as easy as taking a photo.
2020: the pandemic boost
The COVID-19 pandemic turned the QR code into an everyday tool. Restaurants replaced paper menus with digital ones, shops used QR codes for contactless payments and many countries used them for health certificates and visitor check-ins. Millions of people who had never scanned a code learned how in a matter of weeks.
QR code variants
Over the years, versions adapted to different needs have appeared:
| Variant | Feature |
|---|---|
| QR Code Model 2 | The standard version we use today |
| Micro QR | Very small, with a single finder pattern |
| iQR | Supports rectangular shapes and more capacity |
| SQRC | Includes a protected data area |
| Frame QR | Leaves free space for images or design |
The QR code today
Today the QR code is used for mobile payments, transport tickets, event tickets, menus, packaging, marketing, education, two-factor authentication and much more. Its success comes from a combination of capacity, reading speed, error correction and, above all, being an open format anyone can generate for free.
What its history teaches us
The history of the QR code holds several useful lessons for anyone creating codes today. The first is that it was designed to be read quickly and from any angle, so respecting its finder patterns and white margin means respecting its essence. The second is that it was born in demanding industrial settings, with dirt and wear, which is why it includes error correction: using the right level makes your codes tougher. The third is that its success came from being open and free. That is why you should not have to pay for something as basic as generating a standard code.
Frequently asked questions
Who invented the QR code?
Masahiro Hara and his team at Denso Wave, a Japanese company linked to Toyota, in 1994.
Do you have to pay to use QR codes?
No. Denso Wave does not require licenses to use the standard format, which is why you can create codes for free with tools like QRcrea.
Why is it called “quick response”?
Because it was designed to be read at high speed, much faster than the barcodes of the time.
Conclusion
The QR code was created to solve a logistics problem in a Japanese factory and ended up becoming a universal bridge between the physical and digital worlds. The decision to keep it free, its integration into phone cameras and the pandemic brought it into our daily lives. Today anyone can create one in seconds: try it for free with the QRcrea QR code generator.
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