Custom Biome Downloader
by NebulaJinxed
Custom Biome Downloader saves the custom biomes of a Fabric server to a text file, so players can keep a copy of a world's biome data.
What it does
A player joins a Minecraft server that has custom biomes registered through datapacks, then runs a command after joining. The mod scans the server side of the save for custom biome information and their IDs, and writes the result to a text file named after the server or world. Output in the chat confirms the file name, so the player can check that the save worked.
The biome file is placed in the config folder inside the .minecraft directory. Used together with World Downloader, it can help gather a more accurate copy of a world, since the biome data sits next to the terrain that was saved. The mod is built for Fabric only, on game versions 1.21.4 and 1.21.5, where the latest file 1.0.1 for 1.21.5 was published on 2025-06-12. It is client-side only, so servers need nothing installed, and it is released under the MIT License but is not open source.
Key features
Biome scan on command
A command run after joining a server reads the custom biome information and the IDs of the biomes registered there.
Text file output
The biome data is written to a plain text file whose name the mod confirms in the chat.
Custom datapack biomes
Biomes registered through datapacks on the server are included in the saved data, not only the vanilla set.
Config folder location
Saved files are placed in the config folder inside the .minecraft directory, where they can be found after the command runs.
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Use cases
Keeping a biome record
A player who joins a server with a custom datapack can save its biome list for later reference.
Pairing with a world copy
Saving the biome data alongside a world copy gives a fuller picture of the terrain that was saved.
Who it’s for: Players who join Fabric servers with custom biome datapacks and want a text record of those biomes, and players who archive worlds with World Downloader.
How it compares
World Downloader is a Fabric mod for 1.21 – 1.21.10 that is client required with the server optional, and it is released under the MIT License without being open source. NoFingerPrint is client-side only for 1.21.4 under a custom license that is not open source. Datapack Downloader (fork) is open source under the MIT License and is client and server for 1.20.2 – 26.3, so it covers a wider range of builds.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| Custom Biome Downloader | Fabric | 1.21.4 – 1.21.5 | Client-side only | 2025-06-12 |
| World Downloader | Fabric | 1.21 – 1.21.10 | Client required, server optional | 2025-10-16 |
| NoFingerPrint | Fabric | 1.21.4 | Client-side only | 2025-11-18 |
| Datapack Downloader (fork) | Fabric | 1.20.2 – 26.3 | Client and server | 2026-09-16 |
Questions
Does Custom Biome Downloader need to be installed on the server?
Which loader does Custom Biome Downloader use?
Where does the saved biome file go?
In the catalog
Custom Biome Downloader is one of 8,016 Management mods on ModsFinder, and one of 5,930 Management mods for Fabric. 15,307 mods support Minecraft 1.21.5.
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Official listing
- Modrinth page
- modrinth.com/mod/cbd
- Owner
- NebulaJinxed
- Published
- 2025-05-23
- Updated on Modrinth
- 2025-06-12
- Facts verified
- 2026-10-15