QR Code Generator

QR codes (Quick Response codes) were invented by Denso Wave in 1994 to track automotive parts, but their 2D matrix structure made them ideal for encoding URLs and text. A QR code can hold up to 3,000 alphanumeric characters and includes built-in error correction — Reed-Solomon coding allows scanners to read QR codes even when up to 30% of the pattern is damaged or obscured. This is why QR codes remain scannable even when printed over with logos or subjected to minor physical damage.

Practical applications for generated QR codes include: restaurant menus and product labels (encode a URL), business cards (encode contact info as vCard format), event check-in systems (encode a ticket ID), Wi-Fi sharing (encode network credentials in the standard format so phones can join without typing), and print-to-digital campaigns where a poster links to a landing page. All QR codes generated here are rendered as PNG images using the browser's Canvas API. The encoding and image generation happen entirely client-side — no URL or data is transmitted to any server.