Mods Optimizer Mod Guide

What Mods Optimizer Does

Mods Optimizer is a utility mod that tidies up your mods folder automatically. It scans every .jar file and reads metadata from mods.toml, fabric.mod.json, quilt.mod.json, and META-INF/MANIFEST.MF to classify each mod as client-only, server-only, or both. When metadata is missing, it falls back to an internal list of known mods.

Cleaning and Organizing

On a server, client-only mods are renamed with a .client suffix so they are skipped instead of loaded. The mod also detects duplicate or older versions of the same mod by comparing version numbers and patterns, removing the outdated ones. This prevents conflicts and crashes caused by multiple versions sitting in one folder.

Why It Helps

Many mods do not clearly state their side, and some do not follow proper versioning. Mods Optimizer handles both cases so you do not have to sort jars by hand.