for the worthy.
What is a Terraria world seed?
A seed is the value the game uses to generate a world. Two worlds made with the same seed, size, evil biome and special seeds are almost identical. Leave World seed empty and the server picks a random one.How to read a seed
Terraria shows a full seed as five parts separated by dots:size.difficulty.evil.special.identifier.
To copy the seed of a world on your PC, hover over Copy Seed in the world selection menu and click it.
How to set a seed on your server
1
Open Game settings
Open your server in the Game Panel and click Game settings under GAME SETTINGS.
2
Expand New world
Click New world.
3
Enter a new World name
Type a name that doesn’t exist yet. An existing world keeps the seed it was made with.
4
Type the seed
Enter the seed in World seed (“Leave empty for a random world, or type a seed to get the same world as someone else.”). The field takes up to 20 characters. Choose World size and World difficulty to match the seed you want to copy.
5
Save and start
Click Review and save, then Save changes, and restart the server. The world is generated with your seed.
Special seed codes
The game ignores capitals and punctuation in these codes. Typed codes give one special seed at a time. Since version 1.4.5, the in-game Seed Menu combines several, but that menu only exists when you create a world in the game. To combine special seeds, create the world in single player and upload it.
Frequently asked questions
Can I change the seed of an existing world?
No. The seed is only used when the world is generated. Create a new world with a new World name.Why is my seeded world different from my friend’s?
Size, difficulty, evil biome and special seeds must match too. Copy the full seed from the world selection menu and match World size and World difficulty.What are secret seeds?
Version 1.4.5 added secret seeds that stay hidden until someone discovers them. Create such a world in the game and upload it.How do I see the map before I play?
Create the world, download the.wld and open it in TerraMap. See seed and map viewer.
Related guides
Terraria server guide
Every Terraria page in one place.
Seed and map viewer
See a seed’s map.
World size and difficulty
Settings for new worlds.
Upload a world
Bring a world made in the game.
Tested by the FREAKHOSTING team on our Game Panel on 31 October 2026 (Terraria 1.4.5.6, vanilla server). Seed format and codes checked against the official Terraria Wiki World Seed page and special world seeds page. Steps may differ slightly if the game changes.
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Last Updated: October 2026