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July 20, 2026

Custom Mob Spawners & Loot Tables: Map Maker Guide

Create custom mob spawners with modified spawn counts, equipment, delay ranges, and custom loot table drops.

Custom Mob Spawners allow adventure map creators to build intense dungeon encounters. You can control which mobs spawn, what gear they wear, how fast they spawn, and what items they drop upon death.

Custom Spawner Tag Structure in Minecraft 26.x (26.1/26.2)

Mob spawners use the SpawnData block entity tag:

Custom mob spawner block emitting flames and custom armored mob entity
Screenshot from the matching MC Toolbox tool.
/setblock ~ ~ ~ spawner{SpawnData:{entity:{id:"minecraft:zombie",ArmorItems:[{},{},{},{id:"minecraft:diamond_helmet"}]}},SpawnCount:4,SpawnRange:6,MinSpawnDelay:100,MaxSpawnDelay:300}

Editing Loot Tables for Custom Drops

Rather than dropping default rotten flesh, you can assign a custom JSON loot table path to any mob using the DeathLootTable NBT tag.

Design spawner blocks visually with our Mob Spawner Generator and build loot tables with our Loot Table Generator!

Gio Nui

Gio Nui

I'm an independent developer and long-time Minecraft creator. Since 2011, I've been focused on building high-performance, browser-based tools for the community.

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