Custom Mob Spawns
Mob spawning in Minecraft has always followed rules that players can influence but never truly command. Torches stop zombies, slabs prevent creepers, and light levels decide what appears after dark. Custom Mob Spawns changes that equation entirely by handing you a config file where every spawning decision becomes yours to make. If you have ever wanted to fine-tune which creatures appear in your world, where they appear, and how often, this add-on deserves a place in your mods folder.
What Custom Mob Spawns Actually Does
At its core, Custom Mob Spawns is a lightweight, configurable mob spawning mod. It began as a fork of the older Custom Spawns project and now supports Minecraft 1.20 and beyond, giving modern versions the spawning control that older packs once enjoyed. The original mod was created by b3spectacled, and the fork keeps that legacy alive while updating it for current game versions.
Instead of editing datapacks or wrestling with loot tables, you open a single JSON file and adjust spawn weights, biome restrictions, light level requirements, and group sizes. Want creepers to spawn only in deserts? Possible. Want to disable endermen entirely in the Overworld? Also possible. The mod reads your rules and applies them the moment the world loads.
Key Features at a Glance
- Per-mob spawn configuration through a single JSON file
- Support for Minecraft 1.20 and newer releases
- Works on both client and server installations
- Compatible with Cloth Config for in-game configuration screens
- Optional Mod Menu integration for quick access without touching files
- Lightweight footprint that will not tank your tick rate
Supported Versions and Loaders
Custom Mob Spawns targets modern Minecraft releases, specifically 1.20 and everything that followed. It is built for the Fabric loader, which means you will need Fabric API installed alongside it. Cloth Config is a required dependency, so grab that too before launching the game. If you run a server, the same setup applies on the server side, and the config file governs spawning for every player connected.
Because the mod relies on Fabric, it slots neatly into modpacks that already use that loader. Players running vanilla clients will not see the mod, but on a server the spawning rules apply globally regardless of what individual clients have installed.
How to Install Custom Mob Spawns
Client Installation
Installing on a client is straightforward. First, make sure Fabric Loader and Fabric API are set up for your Minecraft version. Then drop the Custom Mob Spawns jar file into your mods folder, alongside Cloth Config. Launch the game and the mod loads automatically. If you would rather not dig through folders, install Mod Menu as well and you can adjust settings from a clean in-game interface.
For players who prefer a hands-off approach, the foxygame.net launcher offers a one-click install path that handles Custom Mob Spawns and its dependencies without any manual file shuffling, which is a genuine convenience when you are juggling several mods at once.
Server Installation
Server owners follow the same process: place the jar and Cloth Config in the server's mods directory, then start the server. The configuration file generates on first run at config/custom-mob-spawn.json. Edit it while the server is stopped, save, and restart. Your new spawning rules take effect immediately.
Editing the Config File
The config lives at config/custom-mob-spawn.json. Open it with any text editor and you will find entries for each mob type. Each entry typically controls spawn weight, minimum and maximum group size, biome tags, and light level thresholds. Lowering a weight makes a mob rarer; setting a weight to zero removes it from natural spawning entirely.
If you installed the mod on a client and want to avoid the file system, Mod Menu provides a graphical editor for the same values. Changes save back to the JSON, so you can switch between methods freely.
Why Players Use It
Custom Mob Spawns shines in three situations. First, technical players building mob farms want precise control over spawn rates and pack sizes. Second, map makers designing adventure worlds need specific creatures in specific places. Third, survival players who simply find certain mobs annoying can trim the spawn list without disabling the entire game's challenge.
When you download Custom Mob Spawns for Minecraft, you are not just installing another tweak mod. You are replacing guesswork with a rulebook you wrote yourself. Whether you run a small survival server or a sprawling modpack, the ability to dictate spawning behavior pays off every single night cycle.
Final Thoughts
Custom Mob Spawns fills a gap that vanilla Minecraft leaves wide open. It is small, configurable, and built for current versions, and it plays nicely with the tools most players already use. Set up Fabric, add Cloth Config, drop in the jar, and start writing the spawning rules your world actually needs.