Best — Qt6 Offline Installer

For those looking to automate or create their own custom offline mirrors, the Qt Installer Framework

: Install Qt on a machine with internet access, then compress the entire installation directory (e.g., Qt6 Offline Installer

If you require both MinGW and MSVC for Windows with Qt6, you need to download two separate offline installers or use the online tool. For those looking to automate or create their

Pros

Do not download Qt6 offline installers from third-party torrent sites or file lockers. Malicious actors have embedded malware in counterfeit Qt installers, specifically targeting developers because they have access to production signing keys. Qt6 Offline Installer