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CurseForge · Minecraft mod
Only Zombies Spawn
Makes only zombies spawn in the world by preventing all other hostile mobs from spawning, including from spawners.
Choose a version Pick your version below, then grab the matching file.
Quick answer
Which Only Zombies Spawn release should I use?
Latest stable file 1.0.3
Game version 1.20.1
Loader Forge
Only Zombies Spawn 1.0.3 targets 1.20.1 with Forge. Do not install it on the client. It must be installed on the dedicated server. No extra mods listed for this file.
Where it goes
Is Only Zombies Spawn required on the client, server, or both?
Do not install it on the client. It must be installed on the dedicated server.
Client Not supported
Dedicated server Required
Loader for this release Forge
Required install it here Optional supported, not mandatory Not supported do not install here Source doesn’t say do not assume
This file is marked server-only.
What else does Only Zombies Spawn 1.0.3 need?
1.0.3. Change the file and its required mods may change too.
This file does not list any required mods. Do not add a library just because a different file uses it.
This file does not list any required or optional mods.
Before you install it
Add Only Zombies Spawn without breaking your instance.
Built for Only Zombies Spawn 1.0.3. Pick another file and the loader, install side or required mods may change.
- 01
Stick to this file
Use 1.0.3. It targets 1.20.1 with Forge; another release may have different loader, side or dependency requirements.
- 02
Bring the mods it needs
This file does not list any required mods. Do not add a library just because a different file uses it.
- 03
Put it on the correct side
Do not install it on the client. It must be installed on the dedicated server.
- 04
Pick the file you checked
Use the “Get this file” button beside 1.0.3. It opens that exact file at the source.
About this project
What does Only Zombies Spawn add?
Only Zombies Spawn
Only Zombies Spawn is a lightweight mod that restricts hostile mob spawns exclusively to zombies. When a non-zombie monster attempts to spawn, it is automatically replaced with one or more zombies.
Features
- Spawn Replacement: Replaces all hostile mobs (monsters) with zombies.
- Wide Coverage: Works for natural spawns, mob spawners, chunk generation, structures, and patrols.
- Boss Exclusion: Ender Dragons and Withers are excluded from replacement and will spawn normally.
- Spawn Multiplier: Configure between 1 to 40 zombies to spawn in place of a single replaced mob.
- Persistence Inheritance: If the original mob was set to not despawn (e.g., via a Name Tag), the replacement zombies will also inherit this persistence.
Configuration
You can open the configuration GUI in-game using the /ozsconfig command to adjust the following settings:
- Allowed Mobs (
allowedMobs): Specify a list of mobs that should be allowed to spawn normally without being replaced. - Disabled Dimensions (
disabledDimensions): Specify dimensions (e.g., The Nether, The End) where the mod's effects should be disabled. - Zombie Spawn Multiplier (
zombieSpawnMultiplier): Set the number of zombies that appear per replacement (Default: 1).
The configuration file is saved at config/onlyzombiesspawn.properties.
Supported Versions
- Forge: 1.18.2, 1.19.2, 1.20.1
- NeoForge: 1.21.1, 26.1, 26.1.2
- Fabric: 1.20.1, 1.21.1, 26.1, 26.1.2
Perfect for zombie-themed worlds, custom modpacks, and survival challenges.
Project description from CurseForge.
Pick your setup
Only Zombies Spawn by Minecraft version and loader
Choose the version and loader you play, then open the matching release.
Minecraft version
26.1.2
2 loader buildsMinecraft version
26.1.1
2 loader buildsMinecraft version
26.1
2 loader buildsMinecraft version
1.21.1
2 loader buildsMinecraft version
1.20.6
1 loader buildMinecraft version
1.20.5
1 loader buildMinecraft version
1.20.4
1 loader buildMinecraft version
1.20.3
1 loader buildMinecraft version
1.20.2
1 loader buildMinecraft version
1.20.1
2 loader buildsMinecraft version
1.19.4
1 loader buildShowing the newest 12 of 15 game versions. Older files are in the list below.
Check the dependencies, then try the file in a copied instance before changing a world you care about.
Recent files
Only Zombies Spawn versions and loaders
1.0.3
onlyzombiesspawn-1.20.1-forge-v1.0.3.jar
8 Jul 2026
Client Not supported Server Required Dependencies No extras listed Listed on Release listing
Check the 1.20.1 · Forge setup 1.20.1Forge release
onlyzombiesspawn-26.2-neoforge-v1.0.3.jar
8 Jul 2026
Client Source doesn’t say Server Source doesn’t say Dependencies No extras listed Listed on Release listing
Check the 26.2 · NeoForge setup NeoForge26.2 release
onlyzombiesspawn-26.2-fabric-v1.0.3.jar
8 Jul 2026
Client Source doesn’t say Server Source doesn’t say Dependencies No extras listed Listed on Release listing
Check the 26.2 · Fabric setup Fabric26.2 release
onlyzombiesspawn-26.1.2-neoforge-v1.0.3.jar
8 Jul 2026
Client Source doesn’t say Server Source doesn’t say Dependencies No extras listed Listed on Release listing
Check the 26.1.2 · NeoForge setup NeoForge26.1.2 release
onlyzombiesspawn-26.1.2-fabric-v1.0.3.jar
8 Jul 2026
Client Source doesn’t say Server Source doesn’t say Dependencies No extras listed Listed on Release listing
Check the 26.1.2 · Fabric setup Fabric26.1.2 release
onlyzombiesspawn-1.21.1-neoforge-v1.0.3.jar
8 Jul 2026
Client Source doesn’t say Server Source doesn’t say Dependencies No extras listed Listed on Release listing
Check the 1.21.1 · NeoForge setup 1.21.1NeoForge release
onlyzombiesspawn-1.21.1-fabric-v1.0.3.jar
8 Jul 2026
Client Source doesn’t say Server Source doesn’t say Dependencies No extras listed Listed on Release listing
Check the 1.21.1 · Fabric setup Fabric1.21.1 release
onlyzombiesspawn-1.19.2-forge-v1.0.3.jar
8 Jul 2026
Client Source doesn’t say Server Source doesn’t say Dependencies No extras listed Listed on Release listing
Check the 1.19.4 · Forge setup Forge1.19.21.19.31.19.4 release
onlyzombiesspawn-1.18.2-forge-v1.0.3.jar
8 Jul 2026
Client Source doesn’t say Server Source doesn’t say Dependencies No extras listed Listed on Release listing
Check the 1.18.2 · Forge setup Forge1.18.2 release
onlyzombiesspawn-26.2-fabric-v1.0.2.jar
24 Jun 2026
Client Source doesn’t say Server Source doesn’t say Dependencies No extras listed Listed on Release listing
Check the 26.2 · Fabric setup Fabric26.2 release
onlyzombiesspawn-26.2-neoforge-v1.0.2.jar
24 Jun 2026
Client Source doesn’t say Server Source doesn’t say Dependencies No extras listed Listed on Release listing
Check the 26.2 · NeoForge setup NeoForge26.2 release
onlyzombiesspawn-26.1.2-neoforge-v1.0.2.jar
16 May 2026
Client Source doesn’t say Server Source doesn’t say Dependencies No extras listed Listed on Release listing
Check the 26.1.2 · NeoForge setup NeoForge26.126.1.126.1.2 release
Looking for an older file? The official CurseForge project page is in Resources.
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