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!