How QR Code Works .....

From Text to Black-and-White Squares QR codes are everywhere today: payments, restaurant menus, login links, tickets, and product information. You simply point your camera at a square pattern and instantly get a website or some text. But what’s actually happening behind the scenes? How does a simple grid of black and white squares store text like https://example.com or HI or Payment Information ? In this article we'll break down the full process step-by-step — from text → binary → grid → scanning → decoding . 1. What Is a QR Code? A QR (Quick Response) code is a type of 2-dimensional barcode invented in 1994 by engineers at Denso Wave in Japan. Unlike traditional barcodes that store information in one direction (lines), QR codes store information both horizontally and vertically . This allows them to store much more data. For example, a QR code can store: URLs text WiFi credentials contact cards payment data event tickets 2. QR Code Structure A QR code is not random pixels. It has seve