CurseForge · Minecraft mod
ProjectEF Neo
ProjectE’s Fabric version
Quick answer
Which ProjectEF Neo release should I use?
ProjectEF Neo ProjectEF-1.21.1-PE1.2.3.jar targets 1.21.1 with Fabric. The project page does not say whether this file belongs on the client, dedicated server, or both. No extra mods listed for this file.
Where it goes
Is ProjectEF Neo required on the client, server, or both?
The project page does not say whether this file belongs on the client, dedicated server, or both.
The source does not explicitly classify this release as client-only or server-only.
What else does ProjectEF Neo ProjectEF-1.21.1-PE1.2.3.jar need?
ProjectEF-1.21.1-PE1.2.3.jar. 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 ProjectEF Neo without breaking your instance.
Built for ProjectEF Neo ProjectEF-1.21.1-PE1.2.3.jar. Pick another file and the loader, install side or required mods may change.
- 01
Stick to this file
Use ProjectEF-1.21.1-PE1.2.3.jar. It targets 1.21.1 with Fabric; 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
The project page does not say whether this file belongs on the client, dedicated server, or both.
- 04
Pick the file you checked
Use the “Get this file” button beside ProjectEF-1.21.1-PE1.2.3.jar. It opens that exact file at the source.
About this project
What does ProjectEF Neo add?
ProjectEF Neo

A modern Fabric port of the classic ProjectE mod for Minecraft 1.21.1.
About
ProjectEF Neo is a modern Fabric port of ProjectE for Minecraft 1.21.1.
The "F" stands for Fabric.
ProjectEF Neo recreates the classic EMC (Energy-Matter Covalence) system, allowing players to:
- Convert items into EMC.
- Permanently learn item values.
- Recreate learned items through transmutation.
- Build powerful alchemical automation systems.
From the Philosopher's Stone to Dark Matter / Red Matter equipment, ProjectEF Neo brings the complete Equivalent Exchange experience to Fabric.
中文名:[Fabric] 等价交换:Neo
Features
EMC & Transmutation
- Convert items into EMC and store their values permanently.
- Transmutation Table and portable Transmutation Tablet.
- Custom EMC value support:
custom_emc.json- In-game commands
EMC Generation & Automation
Build your own EMC production system:
- Energy Collectors (MK1 - MK3)
- Anti-Matter Relays (MK1 - MK3)
- Energy Condensers (MK1 / MK2)
- Dark Matter Pedestal
Equipment & Utilities
Powerful tools and items from the Equivalent Exchange series:
Philosopher's Stone
- Block transmutation
- World conversion
Dark Matter / Red Matter Tools
- Configurable area mining
Dark Matter Furnace
Red Matter Furnace
Alchemical Bags
Eternal Density Gems
Swiftwolf's Rending Gale
GEM Armor
Full GEM Armor abilities:
- Flight
- Night vision
- Step assist
- Additional utility abilities
Trinkets Integration
ProjectEF Neo supports optional Trinkets integration.
Equip accessories such as:
- Rings
- Amulets
- Charms
- Klein Stars
Supported slots:
- hand / ring
- chest / necklace
Trinkets is completely optional.
Without Trinkets, accessories remain usable as normal inventory items.
Compatibility & Localization
- Built-in EMC values for classic Avaritia items.
- Full Simplified Chinese and English localization.
- Compatible with original ProjectE:
- Configuration format
- Mod ID (
projecte)
Requirements
ProjectEF Neo requires:
| Component | Version |
|---|---|
| Minecraft | 1.21.1 |
| Fabric Loader | 0.16.9+ |
| Fabric API | 1.21.1 compatible |
| Java | 21 |
Forge Config API Port and fabric-permissions-api are bundled inside the ProjectEF JAR.
No additional downloads are required.
Installation
Install Minecraft 1.21.1 with Fabric Loader.
Install a compatible Fabric API version.
Download the latest ProjectEF Neo release.
Place the JAR file into your Minecraft: .minecraft/mods
Launch the game.
Optional Integrations
These mods improve the experience but are not required:
| Mod | Purpose |
|---|---|
| JEI / EMI / REI | Recipe viewers |
| Jade / WTHIT | Block information |
| Trinkets | Additional equipment slots |
Compatibility
ProjectEF Neo aims to maintain compatibility with existing ProjectE content.
Maintained Compatibility
Internal mod ID: projecte
Configuration directory: config/ProjectE
Existing:
- Worlds
- Resource packs
- Datapacks
- Configuration files
can be reused whenever possible.
Not Included
The following NeoForge integrations are not supported:
- CraftTweaker
- The One Probe
- Curios
Curios functionality is replaced by Trinkets.
Source Code & Issues
Repository:
https://github.com/wchiway/ProjectEF
Issue Tracker:
https://github.com/wchiway/ProjectEF/issues
When reporting issues, please include:
- ProjectEF Neo version
- Minecraft version
- Fabric Loader version
- Fabric API version
- Reproduction steps
- Latest game log or crash report
Credits
ProjectEF Neo is a Fabric port based on the original ProjectE project.
All credit for the original implementation belongs to:
- SinKillerJ
- pupnewfster
- MaPePeR
- williewillus
- Lilylicious
- MozeIntel
- Kolatra
Special thanks:
x3n0ph0b3
- Creator of Equivalent Exchange 2
MidnightLightning
- EE2 GUI textures
Chiway Wang
- ProjectEF Neo developer and maintainer
License
ProjectEF Neo is released under the:
MIT License
Project description from CurseForge.
Pick your setup
ProjectEF Neo by Minecraft version and loader
Choose the version and loader you play, then open the matching release.
Check the dependencies, then try the file in a copied instance before changing a world you care about.
Recent files
ProjectEF Neo versions and loaders
ProjectEF-1.21.1-PE1.2.3.jar
10 Aug 2026
ProjectEF-1.21.1-PE1.2.2.jar
4 Aug 2026
ProjectEF-1.21.1-PE1.2.1.jar
1 Aug 2026
ProjectEF-1.21.1-PE1.2.0.jar
30 Jul 2026
ProjectEF-1.21.1-PE1.1.0.jar
21 Jul 2026
Looking for an older file? The official CurseForge project page is in Resources.