World Change

Switching always saves the current world before the next one loads. The new world opens from the saves folder while the player stays in the game, and the usual loading screen appears in the same way it does when a player picks a world from the menu, so the player is never sent back to the title screen. The switch works from anywhere, including while connected to a multiplayer server, where it disconnects and loads the local world.

Switching can be done by typing the worldChange command or by opening the World Change Mod Menu entry, which shows a clean vanilla-style list of worlds where one click switches. Smart matching finds a world by its name, and a seed is used only as a tie-breaker when two worlds have the same name. Worlds that cannot be loaded because of an incompatible version are shown locked and disabled. The interface is built from Minecraft's native UI and custom textures, so it looks and feels like the vanilla game.

The mod is published for Fabric only, for six release versions: 1.21.10, 1.21.11, 26.1, 26.1.1, 26.1.2 and 26.2. It runs on the client alone, so players install it and servers do not need it. It is released under a custom license and is not open source; the source code and issue tracker are public.