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Reset only the active world folders when you want fresh terrain while keeping the rest of the server configuration. This permanently removes builds, inventories stored in the world, and explored dimensions unless you keep a backup.

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Reset the world safely

1

Create a backup

Create and verify a server backup. Download the current world if you may want to restore it later.
2

Stop the server

Wait until the console confirms a clean shutdown.
3

Identify every active world folder

Open server.properties and note level-name. Plugin server software may store the Nether and End in related folders ending in _nether and _the_end.
4

Remove or rename the world folders

Rename the active world folders to keep a temporary copy, or remove them only after confirming the backup. Do not remove plugin, mod, or configuration folders.
5

Choose an optional seed

Leave level-seed empty for a random seed, or enter the seed for the new world. Changing this value does not alter terrain that already exists.
6

Generate and test

Start the server and let it generate the new world. Join and confirm the world, Nether, End, and spawn are correct before removing temporary copies.
A world reset is different from a full server reset. A full reset also removes plugins, mods, configurations, logs, and other server data.