No Mob Farms
by orlouge
No Mob Farms is a server-side Utility mod that slows down natural and spawner mob spawning in chunks where mobs die too often.
What it does
The mod implements countermeasures against mob farms on the server. It tracks how many mobs die in a chunk and, when deaths are frequent, lowers the spawn rate there. Naturally spawned mobs are covered, including those produced by mob spawner structure generation, and mob spawner blocks get their own slowdown settings.
Behaviour is controlled by a nomobfarm.properties file. The default values are moderately aggressive: a few deaths in a short time curb spawning quickly, and the algorithm forgets earlier deaths at a slow recovery rate. Lower slowdown and recovery values make it more conservative, a higher maximum wait makes it stricter, and setting natural max wait to 0 disables the natural spawn feature.
Files are published for Fabric, Forge and NeoForge across 8 release versions, 1.18.1 – 1.21.8, under the MIT License. Server owners install it, and players connect with no copy of their own. Fabric builds need Fabric API, and the source code and issue tracker are public.
Key features
Natural spawn slowdown
Naturally spawned mobs in a chunk are delayed once that chunk shows frequent deaths, including structures that generate spawners such as Guardians.
Spawner slowdown
Mob spawner blocks are slowed separately, and the default settings only react after at least 15 mobs die.
Chunk memory
Death data for a chunk is kept for a configurable time, 259200 seconds by default, so an area left alone is restored later.
Adjustable rates
Slowdown rate, recovery rate, maximum wait and minimum deaths are set in the properties file, letting server owners tune the curb.
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Use cases
Who it’s for: Server owners who want to limit mob farms without removing natural spawning. Single-player players do not need it.
How it compares
Spawn Egg Information is client-side only, not open source, under the MIT License and published for 1.18.2 – 1.21.1 on Fabric, Forge and NeoForge, so it changes only what players see. Mob Farm Trap is a Forge mod for 1.20 – 1.20.6, open source under the GNU General Public License v3.0 or later, and it needs both the client and the server. Mob Spawner Tweaks is a Fabric mod for 1.21 – 1.21.11 that is not open source, with an optional client or server side.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| No Mob Farms | Fabric, Forge and NeoForge | 1.18.1 – 1.21.8 | Server-side only | 2025-12-01 |
| Spawn Egg Information | Fabric, Forge and NeoForge | 1.18.2 – 1.21.1 | Client-side only | 2025-05-19 |
| Mob Farm Trap | Forge | 1.20 – 1.20.6 | Client and server | 2025-08-05 |
| Mob Spawner Tweaks | Fabric | 1.21 – 1.21.11 | Client or server, optional | 2026-02-15 |
Questions
Does No Mob Farms need to be installed on the client?
Which loader should a server use?
Can the slowdown be turned off?
In the catalog
No Mob Farms is one of 36,990 Utility mods on ModsFinder, and one of 25,772 Utility mods for Fabric. 17,695 mods support Minecraft 1.21.8.
More from orlouge
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What the author says
This is a Fabric server-side mod that implements various countermeasures against mob farms. This applies to "naturally spawned" mobs (that is, not through a mob spawner or structure generation), including the ones that continuously spawn in structures like Guardians. It detects when mobs originating from certain…
Official listing
- Modrinth page
- modrinth.com/mod/no-mob-farms
- Owner
- orlouge
- Published
- 2021-12-28
- Updated on Modrinth
- 2025-12-01
- Facts verified
- 2026-10-15