ModsJava
Spider Infection
I don't know my version or loader
Open the Minecraft launcher and look at the profile you play on — it names both, like fabric-loader-1.21.4. The version also shows in the bottom-right corner of the game's main menu.
No loader in the profile name? Then it's plain Minecraft, and these mods won't run — you need Fabric or NeoForge installed first.
Mod Description
"The webs are spreading... and nothing is safe."
Spider Infection is a creepy-crawly mod that brings a terrifying twist to Minecraft’s ecosystem. Once neutral creatures, spiders have become the apex predators, infected with a mysterious venom that compels them to attack any and every mob in sight.
Features: Spiders now attack all mobs Once a mob dies by a spider it turns into another spider
Quick facts
- Edition: Minecraft Java
- File type: .jar
- Minecraft versions listed: 1.21.1, 1.21.2, 1.21.3
- 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.
Verified by MCModsHub
- Ships as spider_infection-1.0.0-neoforge-1.21.1.jar — drop this file into the mods folder
- Download size: 10 KB
- Download link checked 31 Aug 2026 — working
These come from our own check of the pack file, not from the source page.