The Flatworld
by romoboss
The Flatworld is a Fabric world generation mod that adds a superflat dimension, reached through a crafted Dimension Anchor Block, where players build freely.
What it does
Entering the dimension opens a flat, superflat-style world populated with mobs and structures, and weather can occur there. The first layer, the second to fourth layers and the fifth to eighth layers each have their own build area, so the terrain can be shaped as far as a player wants. The mod is meant for players who want a creative build space without the problems of ordinary terrain.
The route into the dimension starts with gathering a large number of Slimeballs and smelting them in a furnace into Molten Slimeballs.
The Flatworld requires Fabric API and runs on the client and on the server, so both sides need the mod. It is published for Fabric only, with builds covering 1.21.8 – 26.2 across five release versions, and the latest file, 1.1.1, targets 26.2. The code is released under the MIT License, and the mod is not open source.
Key features
Superflat dimension
A separate dimension with a flat, superflat-style surface where mobs, structures and weather can appear.
Dimension Anchor Block
A block crafted from Thick Slime Blocks, Molten Slimeballs, Amethyst Shards and Planks that gives access to the dimension.
Molten Slimeball chain
Slimeballs are smelted into Molten Slimeballs, which then feed the recipes for Thick Slime Blocks and the anchor.
Layered terrain
The build area is divided into the first layer, the second to fourth layers and the fifth to eighth layers, each shaped by the player.
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 build on Fabric and want a dedicated flat space for creative projects. Server owners can add it as a world generation option, since it runs on both the client and the server.
How it compares
Superflat Biome Extension is also a Fabric mod, with files for 1.21.6 – 26.3 that run on the client and server together, and it is open source under the MIT License. Slime Loot is a Fabric mod for 26.1 – 26.2 with the same client and server environment, but it is not open source and is released under All rights reserved. Superflat Revamped covers Fabric and Forge for 1.21.4 only, is server required with an optional client, and is not open source.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| The Flatworld | Fabric | 1.21.8 – 26.2 | Client and server | 2026-07-04 |
| Superflat Biome Extension | Fabric | 1.21.6 – 26.3 | Client and server | 2026-09-18 |
| Slime Loot | Fabric | 26.1 – 26.2 | Client and server | 2026-07-04 |
| Superflat Revamped | Fabric and Forge | 1.21.4 | Server required, client optional | 2025-01-14 |
Questions
Does The Flatworld require Fabric API?
Does the server need The Flatworld?
Which game versions does The Flatworld support?
In the catalog
The Flatworld is one of 8,515 World generation mods on ModsFinder, and one of 4,027 World generation mods for Fabric. 13,894 mods support Minecraft 26.2.
Similar mods
What the author says
Ever wanted to just build to express your creativity, but terrain was in your way? Let that problem dissappear, by going into the Flatworld! The Flatworld is a superflat world-like environment with no mobs, structures or weather!
Official listing
- Modrinth page
- modrinth.com/mod/the-flatworld
- Owner
- romoboss
- Published
- 2025-08-21
- Updated on Modrinth
- 2026-07-04
- Facts verified
- 2026-10-15