
Modrinth · Minecraft mod
Modern Foundry
An unofficial and independent 1.21.1 NeoForge port of Tinker's Construct.
Quick answer
Which Modern Foundry release should I use?
Modern Foundry 4.0.0 targets 26.1.2 with NeoForge. Installation on the client is optional. Installation on the dedicated server is optional. No extra mods listed for this file.
Where it goes
Is Modern Foundry 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 Modern Foundry 4.0.0 need?
4.0.0. 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 Modern Foundry without breaking your instance.
Built for Modern Foundry 4.0.0. Pick another file and the loader, install side or required mods may change.
- 01
Stick to this file
Use 4.0.0. It targets 26.1.2 with NeoForge; 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 4.0.0. It opens that exact file at the source.
About this project
What does Modern Foundry add?
Dependancy:
Development status
Modern Foundry is under active development. The current source is forked from the original MIT Source Code, and AI was utilized to assist in the porting process.
- (Accepting Thumbnail/Banner Art Donations!)
Credits and Attribution
Tinker's Construct - Original Mod
Thanks to the SlimeKnights projects and contributors, NeoForge, Just Enough Items, and the other libraries and integrations that make this work possible.
Project description from Modrinth.
Pick your setup
Modern Foundry by Minecraft version and loader
Choose the version and loader you play, then open the matching release.
1.21.1
1 loader buildCheck the dependencies, then try the file in a copied instance before changing a world you care about.
Recent files
Modern Foundry versions and loaders
4.0.0
ModernFoundry-26.1.2-4.0.0.jar
20 Aug 2026
1.21.1-4.1.6-NeoForge
ModernFoundry-1.21.1-4.1.6-NeoForge.jar
18 Aug 2026
1.21.1-4.1.3-NeoForge
ModernFoundry-1.21.1-4.1.3-NeoForge.jar
17 Aug 2026
Looking for an older file? The official Modrinth project page is in Resources.