regionmod
by Ghost
regionmod lets players mark two positions in the world and scan the biomes inside the selected area with simple commands.
What it does
Players set two corner positions with commands and the mod treats the box between them as a selection. A biome command then lists the biomes found inside that region, so a player can check an area before building or exploring it. The author describes the commands as inspired by WorldEdit-style selection commands such as pos1, pos2 and biomeinfo.
A size limit on the selection keeps scans from causing lag on large areas. The mod also includes a command for changing the language of its messages, with Polish, English and Russian listed in the author text. It is a client-side only mod, so it needs to be installed on the player's client and not on a server.
regionmod is published for Fabric only, for 1.21.4, with 1.0.1 as the latest file dated 2026-03-06. Its code is released under the MIT License and is open source, with a public source repository and issue tracker. The author lists future updates in the notes, but no changes are described on the Modrinth page.
Key features
Two-position selection
Two corner positions can be set with commands to define a rectangular region in the world.
Biome listing
A biome command shows the list of biomes found inside the selected region.
Selection size limit
The selection is capped in size so that scanning large areas does not slow the game down.
Language setting
The mod's messages can be switched between languages, with Polish, English and Russian named by the author.
Gallery
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Use cases
Checking terrain before building
A builder can scan a planned area to see which biomes it covers before placing a base or farm.
Exploring regions on a map
Players who want to know what biomes a chosen stretch of land contains can select it and read the list.
Who it’s for: Players who build in the Minecraft world and want to read biome information for a defined area. The mod is client-side only, so it suits single-player games and players joining multiplayer servers.
How it compares
antispawn is server-side only and published for Fabric 1.21.6 – 1.21.11, under All rights reserved, so it is not open source. Aps Areas is server-side only, published for Fabric 1.21.1, and is also under All rights reserved. AreaProtection is server-side only, covers Fabric 1.21.11 – 26.2, and is not open source. regionmod differs by being client-side only, for Fabric 1.21.4, and by being open source under the MIT License.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| regionmod | Fabric | 1.21.4 | Client-side only | 2026-03-06 |
| antispawn | Fabric | 1.21.6 – 1.21.11 | Server-side only | 2025-12-15 |
| Aps Areas | Fabric | 1.21.1 | Server-side only | 2026-09-01 |
| AreaProtection | Fabric | 1.21.11 – 26.2 | Server-side only | 2026-09-29 |
Questions
Does regionmod need to be installed on a server?
Which Minecraft version does regionmod support?
Is the regionmod source code available?
In the catalog
regionmod is one of 8,499 Technology mods on ModsFinder, and one of 4,201 Technology mods for Fabric. 17,979 mods support Minecraft 1.21.4.
More from Ghost
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What the author says
Prosty i lekki mod dodający komendy do sprawdzania biomów w zaznaczonym obszarze. Mod zawiera system zaznaczania pozycji oraz komendę do skanowania biomów w wybranym regionie. Dla bezpieczeństwa wprowadzono limit wielkości zaznaczenia, aby zapobiec problemom z wydajnością. A simple and lightweight mod that adds…
Official listing
- Modrinth page
- modrinth.com/mod/regionmod
- Owner
- Ghost
- Published
- 2026-03-06
- Updated on Modrinth
- 2026-03-06
- Facts verified
- 2026-10-15