Nether Spawnproof
Nether Spawnproof places buttons on surfaces in the Nether so that hostile mobs cannot spawn there, and it works on a server alone.
What it does
The mod finds the surfaces where mobs could spawn within a chosen radius and places a button on each one. Blocks that count as spawnable include stone, polished blackstone, warped and crimson stems, and nether wood, which does not burn in the Nether. Overworld wood types also qualify, along with bamboo and cherry. A position is valid when the block below is solid with a full top surface, bedrock included, and the space above is air.
Before anything is placed, the mod shows the number of surfaces that need buttons and a time estimate for each of its two speed modes. The safe mode is slower and the fast mode is quicker, and the chosen mode decides which button types are supplied. Buttons are taken from the inventory in survival mode. The mod is built for Fabric and is published for 1.21.11 only, with files updated on 2026-01-12 and released under the MIT License as open source.
Key features
Surface scanning
The mod checks a radius around the player and lists every spawnable surface where a button can prevent mob spawning.
Two speed modes
Safe mode places buttons more slowly, while fast mode completes the job sooner; the preview shows both before anything is placed.
Button counts
The number of buttons needed and the estimated time for each mode are shown before the placement starts.
Survival inventory use
In survival mode the buttons are drawn from the player's inventory, so the cost of the placement is visible.
Wither skeleton farm support
The mod is intended to help build a Nether wither skeleton farm by keeping spawns on the intended surfaces.
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 and players who build farms in the Nether and want to limit hostile mob spawns on their platforms before building. Players who do not run a server still use the mod on a single-player world.
How it compares
2 Doors is a Fabric mod for 1.21.11 that is server-side only, covering doors rather than spawn surfaces, and its license is the MIT License. Nocreepers is also a server-side Fabric mod for 1.21.11, but it is released under All rights reserved. Wither Skeleton Skull Fragments targets 1.21.10 – 1.21.11 and needs both the client and server, under the MIT License.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| Nether Spawnproof | Fabric | 1.21.11 | Server-side only | 2026-01-12 |
| 2 Doors | Fabric | 1.21.11 | Server-side only | 2026-03-21 |
| Nocreepers | Fabric | 1.21.11 | Server-side only | 2026-04-24 |
| Wither Skeleton Skull Fragments | Fabric | 1.21.10 – 1.21.11 | Client and server | 2026-03-20 |
Questions
Does Nether Spawnproof need to be installed on the client?
Which loader and version does Nether Spawnproof use?
Are the placed buttons taken from the player's inventory?
In the catalog
Nether Spawnproof is one of 11,058 Mobs mods on ModsFinder, and one of 5,189 Mobs mods for Fabric. 19,862 mods support Minecraft 1.21.11.
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What the author says
Places buttons on all spawnable surfaces within a radius to prevent mob spawning. Perfect for Wither skeleton farms in the Nether. Click [START] for safe mode or [START FAST] for fast mode.
Official listing
- Modrinth page
- modrinth.com/mod/nether-spawnproof
- Owner
- manchesterjm1
- Published
- 2026-01-02
- Updated on Modrinth
- 2026-01-12
- Facts verified
- 2026-10-15