The short answer
A static QR directly stores its final content. A dynamic QR usually stores an intermediary URL controlled by a service, which then redirects to an editable destination. The printed image can stay unchanged, but the dynamic QR depends on that service.
Compare the dependencies
When each type is appropriate
Choose static when the final value is stable and independence from a QR provider matters. Choose a dynamic or hosted workflow when changing the destination without reprinting is worth the additional service dependency.
QRStable’s regular generator creates direct static codes. File QR codes are hosted and therefore have different availability and privacy characteristics.
How to verify what a QR contains
Use the QR Inspector to reveal the exact encoded value before opening it. QRStable labels likely intermediary domains using local pattern-based checks; it does not claim that this can identify every redirect.
Sources and testing
QRStable follows the distinction between data encoded in the QR symbol and services reached after scanning. For the history and structure of QR Code, see DENSO WAVE’s QR Code information. See the QRStable testing methodology for the limits of the automated print check.