What is a QR code? Thanks for asking!

QR codes have likely never been used more than in the Covid age. They’ve become ubiquitous especially since the NHS started using them for its test and Trace app. These odd black-and-white grids may all look alike, but in fact every QR code is unique.

QR codes, or quick response codes to give them their full name, were first invented by Japanese engineer Masahiro Hara, working at Denso Wave, a subsidiary of Toyota. They were used in factories to track vehicles while they were being assembled, and to scan components.

Of course QR codes really took off in the 21st century, and in particular with the rise of the smartphone.

What are QR codes used for? So how do QR codes actually work? Can we create a QR code? In under 3 minutes, we answer your questions!

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