What is a QR Code?
A Quick Response (QR) Code is a 2D matrix barcode designed according to ISO/IEC 18004 standards. It encodes text, website URLs, WiFi security keys, vCard business cards, email parameters, or product serial numbers into black and white square modules readable by smartphones and optical barcode scanners.
Error Correction Levels
Level L (7%)Lowest redundancy, maximum data density for short URLs.
Level M (15%)Balanced error recovery suitable for general web use.
Level Q (25%)High recovery resistance for industrial asset tracking.
Level H (30%)Highest error tolerance, supports custom logos or physical wear.
