How to Change the World Seed on a Minecraft Java Edition Server

The world seed determines how the world is generated. It only affects newly generated worlds – so you have to delete your existing world first.

1. Stop the server
   Stop your server via the dashboard.

2. Connect via SFTP
   Connect to your server via SFTP, or use the file browser.

3. Set the seed
   Open the file server.properties, find the entry level-seed= and enter the desired seed:

   level-seed=5101553622029575588
   

   Then save the file.

4. Delete the old world
   Delete the world folder in the main directory. Without this step the server simply keeps loading your old world and the new seed has no effect.

5. Start the server
   Start your server. The world is now generated using your new seed.