The Seed field decides how a new world is generated. Leave it empty and the game picks a random one. Type a seed and you can make the same kind of world again. A seed is up to 40 characters on one line, with no quote marks and no backslashes.
Set a seed for a new world
- Open the World page.
- In the New world card, type a Name that is not used yet.
- Choose Size and Difficulty.
- In Seed, type your seed, or leave it empty.
- Choose Make this world.
- Seed, empty for random
- Make this world
The hint above Seed (1) reads: “Empty for a random world, or one of the game’s special seeds.”
The world is made at the server’s next start, and the server then plays it. A large world takes a minute or two. Restart the server if it is running. Your other worlds stay.
The same field on Startup
The Seed variable on the Startup page is the same setting. It is for a new world only. The server plays the world named in World. If that name is already a world on the server, the server plays that one and the seed is not used. Use a name that is not used yet.
Rules for the seed
- Up to 40 characters.
- One line.
- No quote marks (
") and no backslashes (\).
If you break a rule, the panel says: “One line, up to 40 characters, without quotes or backslashes.” Nothing is saved until you fix it.
Find the seed of a world later
The World page shows Seed: on a world’s row when the world has one. When the server makes a world, the Players page also lists “A new world was made (seed …)” in Joins, leaves and chat.
Special seeds
The game has special seeds that change how a world works, such as Not the bees or For the worthy. You type their word in this same field. The Drunk world is made with the number 5162020 instead of a word. See special seeds on a Terraria server.
The game also has secret seeds that unlock when you type their names. Not checked on 1.4.5.8 as of 13 November 2026: whether the Seed field on a Loafhosts server accepts them.
If it does not work
- The world is not what the seed should make. The world name was already used, so the server played the old world. Pick a name that is not used.
- Nothing new appeared. The world is made at the next start. Restart the server.
- The seed is refused. It is too long, has more than one line, or holds a quote mark or a backslash.
More about the game: Terraria servers.