Core KeeperCore Keeper Seed Map: map and world preview from your seed
The Core Keeper Seed Generator shows you a world's Seed Map before you create it: enter a world seed, choose world options as you would in-game, and see rings, biomes, water, and ore veins in game colors. Free, with no sign-up or save file required—the map is calculated in your browser.
Built by Justin Schuessler
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How it works
How to use the Core Keeper Seed Generator
No installation, account, or save upload—enter a seed and the map is calculated immediately.
Step 1
Enter seed
Type or paste your world seed into the “World seed” field—the exact text you'd enter when creating a new world in-game. Without your own seed, the tool immediately shows a random example world; “Random seed” generates a new one.
Step 2
Adjust world options
Set Chaos, ore density, tunnels, chambers, rivers, lakes, pits, and ceiling holes to match your in-game settings. The preview recalculates after each change.
Step 3
Explore map
Drag to pan the map, and zoom with the scroll wheel or the plus and minus buttons. “Show whole world” returns you to the full view.
Step 4
Share link
Click “Copy link” to share the seed and world options as a link. Anyone who opens it will see the same preview.
World options
Core Keeper world options explained
Each option has the levels Off, Low, Normal, High, and Extreme, just like when creating a new world in-game. “Normal” is the default. Set the options to match your world, or the Seed Map will show a different map.
Chaos
Affects biome distribution and the two inner rings—the Chaos value increases from “Off” to “Extreme”.
Ore density
Determines how many ore veins generate in the biomes.
Tunnel
Determines how many tunnels run through the biomes.
Chambers
Determines how many open chambers generate in the biomes.
Rivers
Determines how many rivers run through the world.
Lakes
Determines how many lakes generate in the biomes.
Pits
Determines how many pits generate in the biomes.
Ceiling holes
Determines how many ceiling holes generate in the biomes.
Preview
What the Core Keeper Seed Map shows—and what it doesn't
The map is generated from the game's terrain classification, translated into JavaScript and run in your browser. You can see the world without creating or exploring it in-game.
What the preview shows
- The rings around the Core and the biomes within them
- Water: rivers and lakes
- Ore veins, tunnels, and chambers
- X and Y coordinates and distance from the Core under the cursor
Preview limitations
- No dungeons, boss arenas, or special structures
- Not a 100% match: 87% of pixels match the explored map areas of a real save
- A bright pink area indicates a color the color table doesn't recognize yet
Discover more
More tools
View an explored world from its world file, edit a save, or create a server configuration.
World Map Viewer
Upload your Core Keeper world file and explore the entire map with biomes, pan, and zoom — all in your browser, with no upload to a server.
Built by Justin Schuessler
Savegame Editor
Upload your Core Keeper character file to view skills, talents, inventory, and character details, then edit it directly. Adjust items, health, avatar appearance (including gender), and discoveries, and export the file. All in your browser, with no upload to a server.
Built by Justin Schuessler
Server Configuration Generator
Describe your ServerConfig.json settings to the ZapX AI Agent in your own words, or set each option manually—with a live preview for your rented Core Keeper server.
Built by Florian Galz
FAQ
Core Keeper Seed Map and world map FAQ
Quick answers about seeds, world options, and preview accuracy.
Yes, that's exactly what this tool does: enter a world seed and, optionally, world options to see a map with rings, biomes, water, ore veins, tunnels, and chambers. You don't need to create or explore the world in-game, and you don't need a save file.
Yes, any text works as a seed. The tool converts it to a number using CRC-32, just like the game—this step was checked against the official Dedicated Server. “Random seed” generates a 12-digit number, as the game does when you don't enter a seed.
Chaos, ore density, tunnels, chambers, rivers, lakes, pits, and ceiling holes, each with the levels Off, Low, Normal, High, and Extreme—the same eight options available when creating a new world in-game. The preview recalculates after each change. Zoom and position stay the same, but a new seed resets the view to the whole world.
Not yet. The current version shows only terrain and biomes (rings, water, ore veins, tunnels, and chambers). It doesn't show dungeons or boss arenas.
Not 100%. The tool uses the game's terrain classification and was tested against a real save: of roughly 5.9 million pixels compared in explored map areas, 87% match the save. The color table has only been calibrated against this one world so far—a bright pink area indicates a color not yet covered.
No. You only need the seed text, not an account or save file. The seed and world options are calculated in your browser using a Web Worker, not on a server. To let you share the view, the tool puts them in your browser's address bar. Whether console worlds with the same seed look exactly the same hasn't been tested. View an explored world from its world file: Core Keeper Map Viewer
Click “Copy link”. The link includes the seed and all world options not set to “Normal”. Anyone who opens it will see the same preview.
Enter the seed text as the world seed when you create a new world. A seed only affects a newly generated world, not an existing one. For a Dedicated Server, the server configuration generator has a world seed field. It only accepts a number of 0 or greater; 0 selects a random seed. You can't enter a text seed there. Go to server configuration generator
Any more questions?
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