Modrinth · Minecraft mod
Universal FML
An easy way to make Forge mods for both 1.8-1.12 and 1.13+
Quick answer
Which Universal FML release matches 1.20.6?
Universal FML 1.0.0 targets 1.8, 1.8.1, 1.8.2 with Forge. Installation on the client is optional. Installation on the dedicated server is optional. No extra mods listed for this file.
Where it goes
Is Universal FML required on the client, server, or both?
Installation on the client is optional. Installation on the dedicated server is optional.
The source marks this as usable on both the client and server.
What else does Universal FML 1.0.0 need?
1.0.0 on 1.20.6. Every mod below is checked against that same setup.
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 Universal FML without breaking your instance.
Built for Universal FML 1.0.0 on 1.20.6. Pick another file and the loader, install side or required mods may change.
- 01
Stick to this file
Use 1.0.0. It targets 1.8, 1.8.1, 1.8.2 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
Installation on the client is optional. Installation on the dedicated server is optional.
- 04
Pick the file you checked
Use the “Get this file” button beside 1.0.0. It opens that exact file at the source.
About this project
What does Universal FML add?
An easy way for mod developers to make Forge mods for both 1.8-1.12 and 1.13+.
Players:
This mod does NOTHING on either the client or server. You do not need to install it. It is for developers only.
Developers:
This mod defines a net.minecraftforge.fml.common.Mod annotation that contains both the legacy (1.8-1.12) and modern (1.13+) fields. This allows you to load one entrypoint in both legacy and modern forge, without having to make a split buildscript or deal with projects like Stonecutter.
Why?
I wanted to mixin into other mods (namely Essential) on 1.8 through 1.20.
Fabric/Neo?
Fabric uses fabric.mod.json to load entrypoints, which is intentionally kept backwards-compatible.
Neoforge uses net.neoforged.fml.common.Mod, which you should be able to add (to a seperate class) and load with no issue.
Usage
Short answer: @Mod(value = "mymodid", modid = "mymodid", useMetadata = true), then put all of your metadata into mcmod.info and mods.toml.
Long answer: see the GitHub.
Project description from Modrinth.
Pick your setup
Universal FML by Minecraft version and loader
Choose the version and loader you play, then open the matching release.
26.2
1 loader build26.1.2
1 loader build26.1.1
1 loader build26.1
1 loader build1.21.11
1 loader build1.21.10
1 loader build1.21.9
1 loader build1.21.8
1 loader build1.21.7
1 loader build1.21.6
1 loader build1.21.5
1 loader buildShowing the newest 12 of 75 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
Universal FML versions and loaders
1.0.0
universalfml-1.0.0.jar
18 Aug 2026
Looking for an older file? The official Modrinth project page is in Resources.