Since it do exist a way to convert Minecraft PS3 worlds to Minecraft Java (PC) worlds, but at this moment January 2019 there still not exist an actual way to transfer Minecraft Saves (Worlds) from PS4 to PC, whoever would create this tool to convert minecraft from PS4 to PC would become instantly famous cause everybody would be linked to his tool/website to download it.

So hurry up! If you are a modder/software engineer, create this tool now cause the world truly need it, I suggest you to upload the tool directly to PlanetMinecraft.com so the news of the existence of this converter would be spread in a matter of a second all around the world considering how famous this website is.