What is a QR Code?
A QR code (Quick Response code) is a two-dimensional matrix barcode invented in 1994 by the Japanese automotive company Denso Wave. Unlike standard 1D barcodes that only hold information horizontally, QR codes store data both horizontally and vertically, allowing them to hold significantly more information.
When scanned with a smartphone camera or a dedicated QR reader app, the encoded data is instantly extracted. This data can be a website URL, contact information (vCard), plain text, email address, or even Wi-Fi network credentials.