You can install Qt Quick Effect Maker with Qt Online Installer or Qt Maintenance Tool. Download Qt Online Installer from Qt Account Downloads.

To install Qt Quick Effect Maker with Qt Online Installer.

1. Open Qt Online Installer, continue to Installation Folder, and select Custom installation.
2. Select Next.
3. Go to Qt > Qt 6.5 (or newer version) > Additional Libraries and select Qt Quick Effect Maker.
4. Complete the installation and close Qt Online installer.

Opening Qt Quick Effect Maker

To open Qt Quick Effect Maker, run qqem.exe located in the bin folder of your Qt installation, for example, C:\Qt\6.9.3\msvc2019_64\bin.