Bad Mobs

This mod provides a simple way to disable any way mob spawning in Minecraft. This is a community port of the original BadMobs mod for Fabric 1.21.1. Once installed, you can modify the generated config file to disable spawning behavior

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About this Mod

BadMobs (Fabric 1.21.1) - Community Port

This mod provides a simple way to disable any way mob spawning in Minecraft. This is a community port of the original BadMobs mod for Fabric 1.21.1.

Once installed, you can modify the generated config file to disable spawning behavior.

Usage Guide

Download the mod and Fabric API. Install it in your mods folder.
Run the game or server once. After it has loaded, close the game or use command /badmobs set.
2.1. Locate the badmobs.json config in your config folder.
Open the config file with a text editor. Every registered mob has options pregenerated for you.
Modify the file to your liking, save it, and start the game again or use command /badmobs reload.

Available Versions

Bad Mobs Fabric 1.0.0release

MC 1.21.1, 1.21.2, 1.21.3, 1.21.4, 1.21.5, 1.21.6, 1.21.7, 1.21.8, 1.21.9, 1.21.10fabric

March 31, 2026

How to Install Bad Mobs on Your Server

Order Server

Order a Minecraft Java server with at least 3 GB RAM (4 GB recommended).

Set fabric Loader

In the panel under "Egg", select the fabric loader and matching Minecraft version (1.21.10).

Install Mod

Open the mod browser in the dashboard and search for "Bad Mobs". Click "Install" – done! Alternatively, upload the .jar via SFTP to the /mods folder.

Compatibility

Mod Loaders

fabric

Minecraft Versions

1.21.10, 1.21.9, 1.21.8 (+7 more)

Server-side

✓ Required

Recommended RAM

4 GB(min. 3 GB)

Frequently Asked Questions

Bad Mobs server crashes on startup – what to do?

Most common cause: wrong fabric version or insufficient RAM. Check the server log (latest.log) for "OutOfMemoryError" or "Mixin" errors. With Mado Hosting: ensure at least 3 GB RAM is allocated and the loader matches the mod version (1.21.10). You can switch loaders with one click in the panel.

Is Bad Mobs compatible with fabric?

Bad Mobs officially supports fabric for Minecraft 1.21.10, 1.21.9, 1.21.8. The Mado dashboard automatically detects incompatible loader combinations.

Server lagging with Bad Mobs – how to optimize performance?

Recommended RAM: 4 GB (per 8 players). Use /spark profiler to check if Bad Mobs consumes the most tick time. Common fixes: reduce server view-distance to 8-10, install "performant" or "starlight" as supplementary mods on Forge. With Mado Hosting, your server runs on NVMe SSDs with dedicated CPU cores for minimal latency.