Download [portable] Qt 5.15.2 Offline Installer -

: Click the Archive checkbox and hit Filter . This will reveal older versions, including 5.15.2, in the list. 3. Building from Source (True Offline) Download Source Package Offline Installers - Qt

For open-source users, the only official way to get the binaries is through the Qt Online Installer . download qt 5.15.2 offline installer

Select and choose the Offline Installer for your operating system (Windows, macOS, or Linux). 2. The Open Source Route (Online Installer) : Click the Archive checkbox and hit Filter