Discover the fascinating technology behind QR codes and how they store and transmit data.
🧙♂️ Learn about QR code structure, data storage, and how modern devices read these magical squares.
A QR (Quick Response) code is a two-dimensional barcode that can store various types of data. Unlike traditional barcodes that can only store information horizontally, QR codes can store data both horizontally and vertically, allowing them to hold much more information.
QR codes consist of several key components:
QR codes use a binary system to store data:
The process of reading a QR code involves several steps:
QR codes use Reed-Solomon error correction, which allows them to be read even if they are:
This is why QR codes can be customized with logos and colors while maintaining their functionality.
QR codes can store up to 3,000 alphanumeric characters or 7,000 numeric characters, depending on the version and error correction level used.
Yes, QR codes can be read without an internet connection. However, if the QR code contains a URL, you'll need internet access to visit the website.
QR codes themselves don't provide security - they simply store data. Always verify the content before scanning, especially for payment or sensitive information.