Spawn Rules
by moofy
Spawn Rules lets server owners block specific mobs and animals from spawning, with settings changed through an in-game menu.
What it does
A server-side Fabric mod that stops chosen mob and animal types from spawning on the server. A hover panel lists, for each mob, whether it may spawn in the Overworld, the Nether and the End, and a click switches that status for each dimension. Changes are written to disk and applied to memory at once, so no restart is needed. Fabric API is required.
The check runs before the mob entity is created, which avoids the server work of building an entity only to remove it, and it also suppresses the Can't spawn entity type warnings that fill the console log. Player-caused spawns stay allowed: spawn eggs, summon commands, breeding with buckets and portal travel are not blocked. Settings can also be edited directly in the configuration file, and the game menu lists survival mobs, including modded ones. The mod is open source under the CC0 1.0 Universal license and is published for 26.2 only.
Key features
Per-mob spawn blocking
Chosen mobs and animals are stopped from spawning on the server, with the list covering modded types as well.
Early spawn cancellation
Spawns are cancelled before the entity is created, which lowers server CPU load during the spawn loop.
Dimension toggles
Each mob can be allowed or blocked separately in the Overworld, Nether and End from one menu.
In-game settings menu
A menu lets an operator change spawn status without editing files, with changes saved to disk and applied immediately.
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: Server owners who want to control natural mob spawning. The in-game menu needs an operator at level 2, set with the spawnrules config command.
How it compares
NoSpawn is a Fabric mod that is open source under the MIT License, published for 1.21.4 – 26.1.1, and needs the server while clients stay optional. No Spiders is Fabric-only, server-side only and not open source, with a file for 26.2 alone. Mob Spawn Control is also server-side only and Fabric, under the MIT License, with files for 1.21 – 26.3, but it is not open source.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| Spawn Rules | Fabric | 26.2 | Server-side only | 2026-07-13 |
| NoSpawn | Fabric | 1.21.4 – 26.1.1 | Server required, client optional | 2026-06-02 |
| No Spiders | Fabric | 26.2 | Server-side only | 2026-08-20 |
| Mob Spawn Control | Fabric | 1.21 – 26.3 | Server-side only | 2026-10-07 |
Questions
Does Spawn Rules need Fabric API?
Do players need to install Spawn Rules?
How is the spawn rule set in the game?
Will spawn eggs and summon commands still work?
In the catalog
Spawn Rules is one of 11,058 Mobs mods on ModsFinder, and one of 5,189 Mobs mods for Fabric. 13,894 mods support Minecraft 26.2.
More from moofy
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What the author says
A server-side Fabric mod that lets you block specific mobs and animals from spawning. It cancels spawns early in the tick loop to save server performance. How to use the In-Game GUI (Click to expand)
Official listing
- Modrinth page
- modrinth.com/mod/spawn-rules
- Owner
- moofy
- Published
- 2026-07-13
- Updated on Modrinth
- 2026-07-13
- Facts verified
- 2026-10-15