Designed as a high-tech marketing resource, QR (quick response) codes have many useful applications. These (usually) black-and-white algorithmic codes are gateways to a potential multimedia nirvana.

QR codes are now a common way to share information, from payment links to Wi-Fi passwords. You can easily create them using ...

QR codes have become an everyday tool, whether you’re scanning a menu at a restaurant, accessing a website, or sharing contact details. But have you ever thought about creating them yourself—right ...