QR Code

A QR code is a two-dimensional barcode that stores information in a grid of black and white squares, readable by a camera from any orientation. Unlike a traditional barcode, which holds data along a single line, a QR code encodes across both dimensions, so it can carry much more — a URL, contact details, Wi-Fi credentials, or plain text. The distinctive square markers in three corners let a scanner find and align the code, and built-in error correction means it still reads even if part is dirty or obscured. That resilience and capacity are why QR codes appear on everything from posters to payment screens.