Stupefied Mobs
Stupefied Mobs lets server owners switch off the AI of chosen mobs by renaming them with a nametag, so the mobs stop acting while the server runs.
What it does
A mob with AI disabled stays in place and takes no part in its usual behaviour. Renaming a mob with a nametag is what marks it, and the mod checks names against a list. Mobs that are loaded without a rename are left alone by default, which keeps the change limited to what the server owner chose. The list of names accepts a wildcard character, so one entry can match several names.
The mod is meant for servers that run large mob farms or many spawners, where active mobs add load to the tick. Mob spawners can be stupefied as well, which lets an owner keep a spawner in place without its spawned mobs taking AI time. Villager activities can be disabled separately, so villagers keep their trades while their routines stop.
Stupefied Mobs runs on the server alone, so players join without installing anything. It is built for NeoForge 1.21.10, with files for 1.21.6 – 1.21.10, and the code is open source under the GNU General Public License v3.0 only.
Key features
Nametag-based AI switch
Renaming a mob with a nametag marks it so its AI is disabled, with no command needed.
Wildcard name list
The list of mob names supports a wildcard character, so one entry can cover several mobs.
External config
The names of disabled mobs are set in an external config file, which can be edited without changing the mod.
Spawner and villager control
Mob spawners can be stupefied, and villager activities are disabled separately so trading still works.
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Use cases
Who it’s for: Server owners who run mob farms or large numbers of spawners and want to lower server load without removing the mobs.
How it compares
Disable Spawner Mob Spawns covers spawners on Fabric, Forge, NeoForge and Quilt for 1.21.9 – 26.3, under the MIT License, and is not open source. Trial Spawns Dont Disable Themselves is a NeoForge and Fabric option for 1.21.1 under a custom license, and is not open source. Force-Load Spawners! is open source under the GNU Lesser General Public License v3.0 or later and covers Fabric, Forge and NeoForge for 1.21.4.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| Stupefied Mobs | NeoForge | 1.21.6 – 1.21.10 | Server-side only | 2025-11-12 |
| Disable Spawner Mob Spawns | Fabric, Forge, NeoForge and Quilt | 1.21.9 – 26.3 | Server required, client optional | 2025-09-10 |
| Trial Spawns Dont Disable Themselves | Fabric and NeoForge | 1.21.1 | Server-side only | 2025-11-12 |
| Force-Load Spawners! | Fabric, Forge and NeoForge | 1.21.4 | Server-side only | 2025-03-24 |
Questions
Does Stupefied Mobs need to be installed on clients?
How does the server choose which mobs have their AI disabled?
Will disabling a villager stop its trades?
Which Minecraft versions does Stupefied Mobs support?
In the catalog
Stupefied Mobs is one of 3,545 Optimization mods on ModsFinder, and one of 1,250 Optimization mods for NeoForge. 15,569 mods support Minecraft 1.21.10.
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What the author says
This mod lets you reduce lag by disabling mob AI with a nametag item. You can change which names have their AI disabled using the external config.
Official listing
- Modrinth page
- modrinth.com/mod/stupefied-mobs
- Owner
- aleksa-dejanovic
- Published
- 2025-11-12
- Updated on Modrinth
- 2025-11-12
- Facts verified
- 2026-10-15