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Disabler: Spawn, Biome, Dimension, Structure & Item Control

About

A server-side utility mod that gives admins control over mob spawns, structure generation, dimension access, world composition, items, loot, and inventories - powered by a simple config file.

You can control:

Block mob spawns

Remove mobs from biome spawn lists
Cancel runtime spawn attempts Disable structures
Prevent entire structure types from generating
Remove their custom mob spawn overrides

Remove biomes

Fully exclude specific biomes from world generation
Cleanly prevent them from appearing in new worlds
Keep land replacements on land and water replacements in water
Includes extra compatibility handling for Alex's Caves cave biome generation paths

Disable dimensions

Cancel dimension travel before entities enter blocked dimensions
Prevent new Nether portals from forming when minecraft:the_nether is blocked
No spawn-teleport fallback: players stay where they are

Block items

Remove configured items from generated loot
Prevent blocked item entities from remaining in the world or entering player inventories
Clean crafting, smelting, player inventory, ender chest, equipment, and open-container results
Optionally scan loaded modded and vanilla storages at a configurable interval

Simple JSON file

No commands, no GUI
Server-side only
No client install required
Optional singleplayer support
Same config/disabler-server.json format on NeoForge, Forge, and Fabric

Configuration

The config file is located at:

.minecraft/config/disabler-server.json

{
  "blocked_mobs": [],
  "blocked_biomes": [],
  "biome_exceptions": [
    "minecraft:mushroom_fields"
  ],
  "blocked_structures": [],
  "blocked_dimensions": [],
  "blocked_items": [],
  "storage_scan": {
    "enabled": true,
    "interval_ticks": 300,
    "block_entities_per_tick": 512,
    "skipped_namespaces": []
  }
}

Parameters

blocked_mobs: Entity type ids that cannot spawn or join a server level. Example: minecraft:zombie.
blocked_biomes: Biome ids excluded from newly generated chunks. Replacements are selected by climate and preserve the land/water category. Example: minecraft:plains.
biome_exceptions: Biomes that cannot be selected as replacements. minecraft:mushroom_fields is excluded by default because it has special terrain requirements.
blocked_structures: Structure ids prevented from starting in newly generated chunks. Example: minecraft:village_plains.
blocked_dimensions: Vanilla or modded dimension ids that entities cannot enter. Travel is cancelled before changing level. Example: minecraft:the_end.
blocked_items: Vanilla or modded item ids removed from loot, item entities, player inventories, crafting and furnace results, open menus, and supported storages. Example: minecraft:elytra.
storage_scan: Group of settings for periodic removal of blocked items from loaded block-entity inventories.
storage_scan.enabled: Enables or disables periodic storage scanning. Event-based item and loot blocking continues to work when this is false.
storage_scan.interval_ticks: Delay between complete storage scan cycles. The default is 300 ticks, approximately 15 seconds.
storage_scan.block_entities_per_tick: Maximum number of queued block entities checked per tick. The default limit is 512.
storage_scan.skipped_namespaces: Mod namespaces whose physical storages must not be scanned. Example: ["examplemod"].

The mod also creates .minecraft/config/DisablerGuide.md with the same parameter explanations. Unopened loot-table containers are left untouched until their loot is generated, preventing interference with Lootr conversion.

If an old .minecraft/config/disabler-server.toml exists and JSON does not, known settings are migrated automatically. The TOML file is retained as a backup, while all further configuration uses JSON.

Watch on GitHub how it works!