Biome Replacer (Neoforge)
by LegendarySpy
Biome Replacer swaps one biome for another across a world, so a server owner can remove unwanted biomes without changing the terrain shape.
What it does
The mod changes which biome appears where, without altering the terrain itself. Rules can replace a single biome with another, or swap an entire biome category in one step, and biome tags are supported so groups of biomes can be targeted together. Only biome-specific features such as colors, mob spawns and vegetation change, while the landscape keeps its shape.
It is aimed at server owners who run worldgen mods like Terralith and want a simpler way to tune biome distribution than editing datapack-based generators by hand. It can also be used to enhance worlds that are already close to what the owner wants. It is server-side only, so players join without installing anything. Forge and NeoForge builds are published for 1.20.1, 1.21, 1.21.1, 1.21.2, 1.21.3 and 1.21.4, and the code is open source under the MIT License.
Key features
Single biome replacement
One biome can be replaced with another through a simple rule, with no datapack editing needed.
Category-wide swaps
An entire biome category can be replaced in one operation, instead of listing each biome separately.
Tag support
Biome tags can select groups of biomes, so rules cover several biomes without naming each one.
Terrain left intact
Only biome-specific features change, such as colors, mob spawns and vegetation, while the landscape shape stays the same.
Gallery
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Use cases
Removing unwanted biomes
A server owner can replace biomes that do not suit the world, keeping the terrain as it was generated.
Tuning worldgen packs
Biome distribution from packs like Terralith can be adjusted with rules, which is simpler than editing their datapacks.
Who it’s for: Server owners who run worldgen mods and want to control biome distribution through a rule system. Single-player players can use it on a local server.
How it compares
Simple Block Replacer is a NeoForge-only server mod for 1.21.1, open source under the MIT License, and it replaces blocks rather than biomes. Biome2 is server-side only for Forge and NeoForge across 1.20.1 – 1.21.4, licensed under the Apache License 2.0 and not open source. Biome Replacer covers the same version span as Biome2 and is also server-side only.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| Biome Replacer (Neoforge) | Forge and NeoForge | 1.20.1 – 1.21.4 | Server-side only | 2025-02-28 |
| Simple Block Replacer | NeoForge | 1.21.1 | Server-side only | 2026-04-01 |
| Biome2 | Forge and NeoForge | 1.20.1 – 1.21.4 | Server-side only | 2025-04-29 |
Questions
Does Biome Replacer need to be installed on the client?
Which loaders does Biome Replacer support?
Can Biome Replacer work alongside Terralith?
In the catalog
Biome Replacer (Neoforge) is one of 8,515 World generation mods on ModsFinder, and one of 5,058 World generation mods for Forge. 17,979 mods support Minecraft 1.21.4.
More from LegendarySpy
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What the author says
Biome Replacer lets you control biome distribution without changing terrain generation. Replace any biome with another while preserving the landscape's shape and only changing biome-specific features like colors, mob spawns, and vegetation.
Official listing
- Modrinth page
- modrinth.com/mod/biome-replacer-neoforge
- Owner
- LegendarySpy
- Published
- 2024-07-26
- Updated on Modrinth
- 2025-02-28
- Facts verified
- 2026-10-15