How Do QR Codes Actually Work?

Pritesh Tailor
4 min readApr 5, 2022
A QR code for the Author’s Medium Profile.

The Covid-19 pandemic has accelerated the adoption and broadened the application of QR codes in day to day life. Most notably, it's been used as a part of track and trace systems and digital vaccine passports in government efforts across the world to tackle the pandemic. Aside from pandemics, it's now used in restaurant dining where we order food via codes glued to the table and the code somehow contains information about what table…

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Pritesh Tailor

DevOps/Cloud engineer and a specialist in Scientific and High Performance Computing with a Phd in Computational and Theoretical Chemistry.