A static QR code stores its information directly inside the visual pattern.
When you create a code for a link, Wi-Fi access, a contact, or a payment, those details become part of the image itself.
Static codes are a good fit for information that is not expected to change often: website addresses, menu pages, contact details, instructions, guest Wi-Fi, or fixed payment details.
Once the code has been downloaded and printed, however, the encoded data cannot be edited.
If there is a mistake in a link, phone number, network name, or payment detail, you need to generate a new QR code and replace the old one everywhere it appears.
Before printing, test the code on different phones and check its contrast, size, and encoded data carefully.