Manage your Minecraft worlds

Your world is the one part of a Minecraft server you can't just reinstall — it's the thing you actually care about. The Worlds page is where you bring worlds in, spin new ones up, and switch between them, all without touching a jar or hand-editing a config. Get comfortable here early, because the habits that keep a world safe (a backup before big changes, renaming instead of deleting) are much easier to build now than to learn the hard way.

Bring a world in from your PC

Got a single-player world, or a build you made offline, that you want to host? Open the Worlds page and use the folder upload — your browser lets you select an entire world folder at once (the one containing level.dat, region/, and so on) and uploads the whole thing. This is how a world you built on your own computer becomes a server everyone can join.

💡 Tip: Upload the world folder itself, not a .zip of it — the browser folder upload handles the directory directly, so there's nothing to unzip afterwards.

Generate a fresh world

Starting new? The Worlds page can generate a world for you: give it a seed (or leave it random) and a world type (default, flat, and so on), and Falix creates it. Handy when there's a specific seed everyone's excited about, or when you want a flat creative canvas.

See it in 3D

Every world has a 3D map powered by BlueMap — a rendered, explorable model you can pan and zoom right in the browser. It's a great way to see how far builds have spread, find your way around a big map, or show off spawn without loading the game.

Which world is active

A server folder can hold several worlds, but only one is the "main" world the server loads. That's decided by the level-name property — it's simply the name of the world folder to load. You'll find it on the Properties (Config) page. Point level-name at a different world folder, restart, and the server loads that world instead. That's the clean way to keep multiple worlds on one server and swap between them.

🎯 Good to know: Vanilla loads one world at a time. If you want several worlds live at once — a hub, a survival world and a creative world you can /mvtp between — that's a job for a multi-world plugin like Multiverse-Core, installed from the Plugins page on a plugin-capable server. It's a plugin matter, not a panel setting, so its own docs cover the commands.

Resetting a world

Want a completely fresh start on the same server? The reliable recipe:

1. Stop the server — a running server holds the world files open.
2. In the File Manager, delete the world folder — or, safer, rename it (e.g. world → world_old) so you can go back.
3. Start the server. With no world folder by that name, Minecraft generates a brand-new one automatically.

Renaming instead of deleting means the old world is still there if you change your mind — and this is exactly the moment to have that backup from the top of the guide.

🎯 Good to know: Rename instead of deleting (e.g. world → world_old) so the old world is still there if you change your mind.

Datapacks

Datapacks tweak world generation, recipes, loot, and functions without any mod or plugin — they're vanilla-friendly, and players don't install anything on their end. The Datapacks page installs them straight into the right place: your world's datapacks folder (<world>/datapacks). Because they live inside a specific world, a datapack applies to that world only — install to the one your level-name points at. After installing, restart or run /reload for the server to pick them up, and /datapack list in the console shows what's active.

Cleaning up map size (advanced)

Worlds grow. Every chunk a player visits is saved forever, so a well-travelled map can balloon on disk. The world map view has tools to trim unused regions and chunks for people who need to reclaim space — powerful, and easy to cut too much, so it gets an advanced-only mention here rather than a step-by-step. Back up first, always.

Verify it works

After uploading or generating, set level-name to that world (if it isn't already), restart, and join — you should spawn in the right place. The BlueMap view is a quick sanity check that the world loaded and looks like what you expected.

Troubleshooting

• Uploaded world doesn't load — level-name probably doesn't match the folder name, or you uploaded a .zip instead of the folder. Check that level-name equals the world folder's exact name and that the folder contains level.dat.
• Reset didn't generate a fresh world — the old folder is still there under the same name, so the server reused it. Stop, rename or delete it, then start again.
• Lost a world after a reset — this is why the backup and the rename-don't-delete advice exist. Restore from backups if you have one.

Next steps

• Customize your server
• Backups
• Performance and lag