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Worldgenyou can stand in

Build a world generator without leaving Minecraft.Tweak it, fly around, tweak again, then put it on your server.

Request beta access

Edit the terrain from the inside

Massif Studio opens its editor right in Minecraft. Raise the peaks, carve a valley, swap the forest for a desert, and the land around you regenerates a few seconds later. No restarts, no fresh world, no waiting.

How it works

  1. Build it together

    Shape your generator with nodes, right in the game. Your whole team works in the same project at once, and every change shows up for everyone in real time.

  2. Saved as you go

    Projects live in your Massif account. Undo a change, set checkpoints, and restore an earlier version when an experiment goes wrong.

  3. Use it on your server

    Add the free Massif plugin to your Paper server or your Minestom project, or pregenerate the whole map ahead of time.

Your players join with vanilla Minecraft

Massif runs on your server. Players connect with the normal game, with no mod to install. Only the people building the world need Massif Studio.

BuildersMinecraft with Massif Studio
Your serverPaper or Minestom, with Massif
PlayersPlain Minecraft, no mod

Bring your own blocks and mods

Use custom blocks from server plugins like CraftEngine, with vanilla fallbacks so your world never breaks if one goes missing. Fabric and NeoForge mods are next: import a mod, and its blocks and structures are ready to use in Studio.

Your blockFrom a plugin like CraftEngine
Its fallbackA vanilla block you pick, so nothing breaks

Questions

Do my players need to install anything?

No. Massif generates the world on your server, and players join with the normal game. Only the people building the world use Massif Studio.

Which versions does it support?

Massif runs on Paper 26.3 and 1.21.11, and on Minestom. It is made for Java Edition.

Is it free?

The server plugin is free, and Massif Studio is free during the closed beta.

Can I use it on an existing world?

Yes, for new areas. Massif generates terrain as chunks are created, so chunks that already exist stay as they are. A fresh world gives the cleanest result.

Does my server need to stay connected to Massif?

No. Once you export your world, it runs entirely on your server and never contacts Massif.

Can I pregenerate the map?

Yes. The pregenerator builds the whole map ahead of time, so it is ready before your players arrive.

Join the closed beta

We are starting with a small group of server owners, creators and builders. Tell us what you would like to make and we will send you an invite.