Short, practical guides for when a QR code stops working, and for printing one that never will.
Put a QR code on business cards, flyers or signs that scans and never stops working. Minimum size, white border, contrast, paper finish, and how to test your proof.
What a free QR code generator looks like: no account, no trial, no expiry. How to test any generator in one minute before you print, and which file format to use.
Static QR codes hold your link and never expire. Dynamic codes use a short link you can edit, but depend on a server. A plain comparison, and when each is right.
Got an email saying your QR code will expire, or found it deactivated after a trial? Why QR codes expire, which ones never can, and how to fix printed codes.
Your printed QR code stopped working unless you pay? It was probably a dynamic code on a trial. How to check, what to do with what you printed, and how to avoid it.