QR Code Generator

QR (Quick Response) codes encode data in a two-dimensional grid of black and white squares. Invented by Denso Wave in 1994 for tracking automotive parts, they've become universal for URLs, WiFi credentials, payments, and contact information.

A QR code contains several key elements: finder patterns (the three large squares in corners) help scanners detect and orient the code, alignment patterns correct for distortion, and error correction (Reed-Solomon codes) allows the code to be read even when partially damaged — up to 30% at the highest level.

QR codes can store up to 4,296 alphanumeric characters or 7,089 numeric digits, though shorter content produces smaller, more reliably scannable codes. For URLs, keep them short — use a link shortener if needed. This tool generates standard QR codes that work with any smartphone camera or scanner app.