Hey! I built a faction spawn on single player. How do I convert it to be able to use it on my pmmp server?
an .mcworld file is just a glorified .zip file, so you can change the file extension, then extract it into your worlds/ directory. However do note that worlds modified in >=1.2.13 are not currently supported.
You can convert your world in MCPE to MC java version if you have it. And then copy the converted world to your worlds folder.