ModsJava
Nether Spawnproof
Java mod listed for Minecraft 1.21. Downloads from the MC Java Mods app on Android.
Places buttons on spawnable surfaces to prevent mob spawning. Perfect for Wither skeleton farms in the Nether. Two speed modes, preview before placing…
⬇ Download on ModrinthSpawnProof
Places buttons on all spawnable surfaces within a radius to prevent mob spawning. Perfect for Wither skeleton farms in the Nether.
Commands
| Command | Description |
|---|---|
/spawnproof |
Preview with default radius (128 blocks) |
/spawnproof <radius> |
Preview with custom radius (8-128 blocks) |
/spawnproof stop |
Stop the current task |
/spawnproof help |
Show all commands |
Features
Speed Modes
| Mode | Rate | Use Case |
|---|---|---|
| Safe (default) | 10 buttons/sec | Conservative, minimal server impact |
| Fast | 200 buttons/sec | Quick coverage, tested with no TPS lag |
Click [START] for safe mode or [START FAST] for fast mode.
Preview System
Before placing any buttons, the mod scans the area and shows:
- Spawnable blocks found - Actual count of surfaces needing buttons
- Buttons in inventory (survival mode)
- Time estimates for both speed modes
Game Modes
| Mode | Who | Behavior |
|---|---|---|
| OP Mode | Players with permission level 2+ | Unlimited stone buttons |
| Survival Mode | Regular players | Uses any button type from inventory |
Supported Button Types (Survival Mode)
- Stone, Polished Blackstone - Don't burn
- Warped, Crimson - Nether wood, don't burn in the Nether!
- Oak, Spruce, Birch, Jungle, Acacia, Dark Oak, Mangrove, Cherry, Bamboo
Spawnable Block Detection
A block is considered spawnable if:
- Current position is air (where the button will go)
- Block below is solid with full top surface (not bedrock)
- Block above is air (mob headroom)
Technical Details
- Minecraft: 1.21.11
- Mod Loader: Fabric
- Dependencies: Fabric API
- Source: GitHub
Quick facts
- Edition: Minecraft Java
- File type: .jar
- Minecraft version listed: 1.21.11
- How to install: Install the matching mod loader (Forge, Fabric or NeoForge) for your Minecraft version. → Download the .jar. → Put it in the .minecraft/mods folder and launch that loader profile.
- Where to get it: Opens on Modrinth — not every file is mirrored on our own servers.
Install steps are the general flow for this file type — How to install Minecraft Java mods & modpacks walks through it step by step.
File checked by MCModsHub
- Ships as spawnproof-1.0.1.jar — drop this file into the mods folder
- Download size: 17 KB
- Download link checked 21 Oct 2026 — working
These come from our own check of the pack file, not from the source page.