QR codes (Quick Response codes) are two-dimensional barcodes that can be scanned by smartphones to quickly access information. Common uses include sharing URLs (website links, app downloads), WiFi network credentials (scan to connect), contact details (vCard), event ticketing, and payment links.

All QR code generation happens entirely in your browser — nothing is sent to any server. You can customize the size, foreground/background colors, and error correction level (higher levels allow the code to be scanned even when partially damaged or covered).