Summon Wither Generator Summon Mob Generator for Java 1.21.5

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Try the Commands Troubleshooting and Help page if you get stuff with server errors. Found a bug or want a feature, let us know on reddit.

Minecraft Wither NBT Data Tags

Using the summon command to spawn in a minecraft wither is simple, take the command and enter into chat and presto you have a wither.

How to summon a Wither with invulnerability.

Withers have an invulnerability timer when summoned, this counts down at 20 ticks per second.

/summon minecraft:wither ~ ~ ~ {Invul:1200} (Invulnerability for 60 seconds)
/summon minecraft:wither ~ ~ ~ {Invul:6000} (Invulnerability for 5 minutes)

Minecraft Versions Permalinks

If you find yourself using a particular version all the time, you can link directly. There is some crossover between versions, so there will be quirks.

Version History

13 Aug 2026
minecraft/command-generator 2.41

addedUUID converter
patchFix for issue with items not re-encoding correctly for items, trades and containers
patchTrades for 1.20.4 and earlier now auto add Count if missing

6 Aug 2026
minecraft/command-generator 2.40

addedRefactored code base internally
patchSlime and Magma cubes, added isBaby tag
patchSulfur cubes added Size, and isBaby tags

30 Jul 2026
minecraft/command-generator 2.39

addedFull Mob Generator v2 rollout
patchMob spawner command generation


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(129 More Updates)