Even though there isn't a standalone offline executable for open-source users, you can still install 5.15.2 using the standard Online Installer by following these steps: Stack Overflow Run the installer and log in with your Qt Account. Select Components page, click the checkbox and hit This will reveal older versions, including , which you can then select for installation. 2. Official Source Archives
Qt (pronounced "cute") is a cross-platform application development framework used for developing applications with a graphical user interface (GUI) and a lot more. It's written in C++ and provides a comprehensive set of libraries and tools for building applications that run on multiple platforms, including Windows, macOS, Linux, Android, and iOS. download qt 5.15.2 offline installer
This downloads all components into ./qt_cache , which you can reuse offline. Even though there isn't a standalone offline executable