Since Qt 5.15.2 reached "End of Life" for open-source users in terms of new binary updates, official offline installers are primarily available through two main channels: 1. For Commercial License Holders
However, if you just want to install without using the official commercial installer, the industry standard solution is to use aqtinstall . It is a legitimate, open-source tool that accesses the open-source files that Qt still hosts on their mirrors but hides behind the installer login. qt 5152 offline installer
./qt-opensource-linux-x64-5.15.2.run --script qt-installer-noninteractive.qs --platform minimal Since Qt 5