QR code generator
https://tooltiki.com
A QR code stores data directly in its pattern of black and white squares — there is no lookup and no server involved. The codes made here contain exactly what you type, so they work forever, cannot be redirected later, and record nothing when scanned. Error correction lets a code still read with up to 30% of it damaged.
How to make a QR code
Free QR services usually give you a short redirect link rather than your own data, which lets them count scans — and lets the code stop working when they change their pricing. A code with the destination inside it is larger and denser, and that is the trade: a longer link makes a busier code. Shorten the URL before generating if density matters, and check that the shortener is one you trust to still exist in five years.
Questions
No. The data is in the pattern, so there is nothing to expire and nobody to keep paying.