Creating a QR Code Offline
Most QR code generators, including this one, need an internet connection to load the tool itself — but once a code is generated and downloaded, the QR code file works completely offline forever. No connection is ever needed to scan a static QR code.
It's worth separating these two moments clearly: generating the code (a one-time step that typically needs the generator's website or app to load) versus scanning it later (which needs zero connectivity for a static code, since the destination data is embedded directly in the pattern). If you need to prepare QR codes somewhere with no internet at all, that requires a locally-installed offline generator tool rather than a web-based one — a different category of software than what most people are searching for when they ask this.