The QR codes generated with our API and/or this QR code generator are delivered without any kind of tracking mechanism. This means we dont capture any data of users scanning QR codes created. The QR codes generated here contain exactly the data you entered(indeed, there are some shady providers on the net who try to store hidden redirects via their servers and change you after some time or the redirection will be switched-off). Because our QR code generator encodes the exact data into the QR graphic, the created QR codes are also getting larger and form a more complex pattern if there is more data to store. The QR code image/symbol will be deleted- 30 seconds after delivery from the cache and is not permanently stored. Additionally, our on webservers logfiles are storing some data about the request(namely Broswer type and version, operating stystem, etc.- all of this data has nothing to do with the QR code contents!) Another important detail that should be noted, because our systems are not involved when the QR code gets scanned the codes cannot “expire”(also refer to FAQ entry for more information)