Mob Eradicator
by nikohalfkino
Mob Eradicator is a NeoForge server mod that stops chosen mobs from spawning, driven by a simple config file.
What it does
Mob spawning is controlled through a config file, where entries can name specific mob types or match several at once with regular expressions. A pattern such as a shared prefix can block an entire family of mobs in one line, and a single rule can stop zombies from appearing in the world.
Changes to the config take effect while the game runs, through hot reloading, so a server owner does not need to restart to adjust the list. The author built the mod mainly to help modpack creators tune spawning. Players who lack the mod still see a disabled message in the action bar when a blocked mob is attempted.
The mod is published only for NeoForge 1.21.1. Files are released under the MIT License, and the source code and issue tracker are public. The server must run it, while players may add it for the action bar message.
Key features
Config-based spawn blocking
A simple config file lists the mob types that should never spawn, with no code or datapack needed.
Regex matching
Regular expressions let one entry block several mob types at once, instead of listing each name separately.
Hot reloading
Edits to the config are applied while the game keeps running, so changes do not require a restart.
Action bar notice
Players without the mod still see a disabled message in the action bar when a blocked mob would have spawned.
Gallery
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Use cases
Modpack tuning
Creators of modpacks can remove unwanted mobs from a pack by adding patterns to the config.
Server management
Server owners can block specific mob families on their world without touching the game files.
Who it’s for: Modpack creators and server owners who want to control which mobs spawn, without writing code.
How it compares
Tom's Mob Stopper is a NeoForge server mod for 1.21.1 – 1.21.4, under the Mozilla Public License 2.0 and not open source. Create Regex is also server-side and for 1.21.1, but it is released under the MIT License and not open source. Advancement-Based Spawning covers Fabric, Forge and NeoForge across 1.19.2 – 1.21.1, and is open source under the GNU Lesser General Public License v3.0 only.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| Mob Eradicator | NeoForge | 1.21.1 | Server required, client optional | 2026-01-12 |
| Tom's Mob Stopper | NeoForge | 1.21.1 – 1.21.4 | Server-side only | 2025-02-18 |
| Create Regex | NeoForge | 1.21.1 | Server-side only | 2025-07-18 |
| Advancement-Based Spawning | Fabric, Forge and NeoForge | 1.19.2 – 1.21.1 | Server-side only | 2026-01-08 |
Questions
Does Mob Eradicator need to be installed on the client?
Which game version does Mob Eradicator support?
Can one config line block several mob types?
In the catalog
Mob Eradicator is one of 11,058 Mobs mods on ModsFinder, and one of 4,974 Mobs mods for NeoForge. 32,366 mods support Minecraft 1.21.1.
More from nikohalfkino
Similar mods
What the author says
Stop mobs from spawning with a simple config file. Yeah! This was made with the intention of aiding modpack creators.
Official listing
- Modrinth page
- modrinth.com/mod/mob-eradicator
- Owner
- nikohalfkino
- Published
- 2026-01-10
- Updated on Modrinth
- 2026-01-12
- Facts verified
- 2026-10-15