Turn a singleplayer Minecraft world into a real, persistent dedicated server with a stable join address - self-hosted, open source, inspired by e4mc.
A tool for turning a singleplayer Minecraft world into a real standalone dedicated server, running independently of the game client, with a persistent join address (via a relay - see relay/) that stays the same across restarts. Inspired by e4mc, whose tunneled address is tied to the game client's own session and resets whenever you close it.
The server keeps running after you close Minecraft. With autostart enabled, it also comes back automatically after a reboot (as long as your PC is on).
1. Download MCPersist-windows.zip from Releases and extract it. 2. Run MCPersist.exe inside the extracted folder. Click Set Up New World - instances from Prism/MultiMC/PolyMC/ATLauncher and the official launcher are detected automatically and offered as a pick-list; pick one, or point it at your instance folder yourself if yours isn't found. Then either select one of your existing singleplayer worlds to promote, generate a brand-new one from scratch, or switch to a server you've already set up before (instant, no re-download), and follow the wizard - the right Java version downloads automatically if you don't already have it, no separate install needed. 3. Click Start. The join address shown is what you give your friends.
Set up more than one world over time? Every server you've made stays around - open Set Up New World again and pick Switch to a Previous Server to jump between them instantly, without re-downloading anything.
From the project README.
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