Do QR codes expire?
A QR code itself never expires: the pattern is just encoded data, and a static code keeps working as long as its destination page exists. What does expire is service behind a dynamic code, and on some providers, codes stop redirecting when a trial or subscription lapses. TangoQR codes keep redirecting forever, free plan included.
The image can't expire; it's math, not a subscription. For a static code, the only thing that can die is the page it points to. For a dynamic code, there's a redirect service in the middle, and that's where expiry sneaks in: several providers deactivate codes when a free trial ends, which is why "my QR code expired" almost always means "my QR provider's trial expired".
So the honest checklist: know which kind of code you have (paste it into the URL checker if unsure), keep the destination page alive, and if it's dynamic, pick a provider whose codes outlive the plan. That last one is a deliberate TangoQR promise: codes never stop redirecting, on any plan.
See also
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