How to Set the World Seed on Your Core Keeper Server
How world seeds work on Core Keeper servers and how to generate a new world with a specific seed.
Setting a Seed
Via startup parameter:
-worldseed 12345Or in ServerConfig.json:
"worldSeed": 12345A value of 0 means random seed generation.
Generating a New World with a Different Seed
- Change the seed value
- Also change the
worldindex to an unused slot (e.g., from0to1) - Restart the server
⚠️ Important: Changing the seed without changing the world slot does nothing — the server loads the existing world from that slot. You must use an empty slot for a new seed to take effect.
World Slots
Core Keeper supports 30 world slots (index 0–29). Each slot is a separate world save.
Related Guides
How is this guide?
How to Change Seasonal Events on Your Core Keeper Server
How to enable, disable, or override seasonal events like Halloween and Christmas on your Core Keeper server.
How to Configure Your Core Keeper Dedicated Server
Complete Core Keeper server configuration guide — ServerConfig.json settings, startup parameters, Game ID, world modes, and seasons.