AutoHibernate is a server-side Fabric mod that automatically puts your Minecraft server into deep hibernation when no players are connected, and seamlessly wakes it up the moment someone joins. By hibernating the server, you save significant CPU and power resources while keeping your world exactly as players left it.

✨ Key Features

• Zero Idle Resource Usage — Server CPU usage drops to 0% (or near 0%) when the server is empty.
• Preserves World State — Block updates, entity movements, crop growth, and random ticks are completely paused.
• Freezes Local Difficulty — In-game time stops ticking, preventing regional difficulty from artificially increasing while nobody is playing.
• Seamless Resuming — The server instantly wakes up without any noticeable lag or delay when a player connects.
• Console Support — Commands entered into the server console continue to work perfectly fine while the server is hibernating.

🎮 Commands

You can manually control the hibernation behavior using the /autohibernate command:

Command	Description
/autohibernate	Shows the current status
/autohibernate autopause true	Enables automatic hibernation when the server is empty
/autohibernate autopause false	Disables automatic hibernation
/autohibernate sleep	Instantly forces the server to hibernate
/autohibernate wake	Instantly wakes the server from hibernation

❓ FAQ

Can you update this to a newer version of Minecraft? Try using the latest version of the mod first! It often works perfectly fine even if Modrinth doesn't explicitly list the newest Minecraft snapshot or minor version as supported.

Can you port this to an older version of Minecraft? Probably not, as this would likely require porting to a completely different mod loader.

Can you port this to Forge/NeoForge/Paper? I may port this to other mod loaders in the future if I have the time, but for now, it remains a Fabric mod.