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QR codes — or "Quick Response" codes — are square-shaped barcodes that can be scanned by mobile devices. They are used for a variety of applications, from pulling up a restaurant menu to directing people to a podcast.
QR codes can also be used in wedding invitations to direct guests to the wedding website, where they can RSVP and find information on the venue, hotel options, and the registry.
Creating a QR code is a relatively straightforward process, and it can be done on a computer as well as your Android or iOS device. Here's how it's done.