WorldGen
With WorldGen, a player can generate chunks of an existing world ahead of exploration, using a dedicated screen on the World Selection list.
What it does
WorldGen pre-generates Minecraft worlds, with speed as its main goal. It generates more chunks in a world that already exists, and by default it only creates chunks that are not yet present, so chunks already saved are not overwritten. The mod can also be used directly from the Create New World screen, although the usual approach is to create and save the world first, then open it with WorldGen. Fabric API is required on Fabric. The mod runs on the client only, so servers do not need it, and it is published for Fabric and Forge across 8 release versions, 1.18.2 – 1.20.1.
Unlike other chunk pre-generation methods, which need a full Minecraft server running, WorldGen uses a lightweight internal server to generate chunks efficiently. Its dedicated screen allows multithreading. The downside is that the world must be opened in the Minecraft client to be played, and it cannot be loaded elsewhere once chunks have been generated with WorldGen. The source code is open and the mod is licensed under the Apache License 2.0.
Key features
Pre-generation of existing worlds
Chunks are generated ahead of player exploration for a world that has already been saved.
Dedicated generation screen
A button on the World Selection screen opens a panel for choosing the world and the area to generate.
Chunk and block coordinates
The generation area uses chunk coordinates, one chunk being 16x16 blocks. The F3 debug menu shows the current chunk position.
Multithreaded generation
The dedicated interface runs generation across several threads, which is why generation is fast.
Gallery
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Requirements
Dependencies declared by the latest file for each loader.
Required 1
Use cases
Who it’s for: Players who run large or long-lived singleplayer worlds, and players who want to prepare a map before exploring it. Storing the world on an SSD is recommended, since a hard drive slows generation of new chunks.
How it compares
Wastify is server-side only and published for Forge, 1.16.5 – 1.20.1, under the MIT License. No Caves Mod is also server-side only, with Fabric, Forge and NeoForge files for 1.19.3 – 26.1.2, under the MIT License. Each of these works differently from WorldGen, which runs on the client and needs no server mod.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| WorldGen | Fabric and Forge | 1.18.2 – 1.20.1 | Client-side only | 2024-05-25 |
| Wastify | Forge | 1.16.5 – 1.20.1 | Server-side only | 2023-06-20 |
| No Caves Mod | Fabric, Forge and NeoForge | 1.19.3 – 26.1.2 | Server-side only | 2026-05-07 |
Questions
Does WorldGen need Fabric API?
Can WorldGen run on a server?
Why could a world be lost while using WorldGen?
In the catalog
WorldGen is one of 8,515 World generation mods on ModsFinder, and one of 4,027 World generation mods for Fabric. 34,764 mods support Minecraft 1.20.1.
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What the author says
WorldGen is a mod for pre-generating Minecraft worlds, with a main focus on speed. By default, existing chunks will not be overwritten and only new ones will be generated.
Official listing
- Modrinth page
- modrinth.com/mod/world-gen
- Owner
- caeruleusDraconis
- Published
- 2022-06-26
- Updated on Modrinth
- 2024-05-25
- Facts verified
- 2026-10-15