Hi @abclot_89
That's a great idea.
There are number of free QR code generators available online. Unfortunately I cant recommend any as they are 3 party sites. You could search for free QR code generator and you'll find some.
From there you just need to copy a link for your shop or items that you want to show. You should be able to save it and add it to to your business card after that.
Thanks,
Dave
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