Since late 2020, The Qt Company shifted its focus toward the Online Installer for open-source users. However, you can still find 5.15.2 through these primary channels: 1. The Official Qt Account Portal
Select and choose the Offline Installer for your operating system (Windows, macOS, or Linux). 2. The Open Source Route (Online Installer) download qt 5.15.2 offline installer
If you need (5.15.3+, 6.x) offline for open-source, they are not officially available. You must build from source or use a package manager ( vcpkg , conan , homebrew ). For commercial use, Qt Company provides offline installers for all versions. Since late 2020, The Qt Company shifted its