Unreal Editor for Fortnite (UEFN) is a PC application for designing, developing and publishing games directly into Fortnite.
If you’re already a Fortnite developer, you’ll recognize many of the same devices that power your Fortnite experiences, but with more “under the hood” access that you can use to make things look and perform exactly the way you want.
Fortnite Creative and UEFN are complementary toolsets. Explore the UEFN documentation to learn more.