Wallpaperize
Turn your oddly sized wallpapers into a piece of beauty. Simply right click on your picture's file, and select "Wallpaperize" from the drop down menu.
Instalation
You can find this app on AppCenter, on elementary OS
Build the App
Run meson build to configure the build environment and then change to the build directory and run ninja to build
meson build
cd build
mesonconf -Dprefix=/usr
ninja
To install, use ninja install, then execute with com.github.philip-scott.wallpaperize
sudo ninja install
com.github.philip-scott.wallpaperize
Credits
Original app: http://backgroundifier.archagon.net Request from: Mario Daniel Ruiz