CurseForge · Minecraft mod
JamLib
The platform-agnostic, Architectury based library used in all of JamCoreModding's mods
Quick answer
Which JamLib release matches 1.21.11 NeoForge?
JamLib V2.0.0+1.21.11 (NeoForge 1.21.11) targets 1.21.11 with NeoForge. 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 JamLib 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 JamLib V2.0.0+1.21.11 (NeoForge 1.21.11) need?
V2.0.0+1.21.11 (NeoForge 1.21.11) on 1.21.11 NeoForge. 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 JamLib without breaking your instance.
Built for JamLib V2.0.0+1.21.11 (NeoForge 1.21.11) on 1.21.11 NeoForge. Pick another file and the loader, install side or required mods may change.
- 01
Stick to this file
Use V2.0.0+1.21.11 (NeoForge 1.21.11). It targets 1.21.11 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
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 V2.0.0+1.21.11 (NeoForge 1.21.11). It opens that exact file at the source.
About this project
What does JamLib add?

Report Issues • Chat on Discord • CurseForge • Modrinth
JamLib provides:
- Platform abstractions
- A JSON5 config API
- A mod repost (9minecraft etc.) checker
Comprehensive documentation can be found here.
Project description from CurseForge.
Pick your setup
JamLib by Minecraft version and loader
Choose the version and loader you play, then open the matching release.
26.2
3 loader builds26.1.2
3 loader builds26.1.1
3 loader builds26.1
3 loader builds1.21.11
3 loader builds1.21.10
3 loader builds1.21.9
3 loader builds1.21.8
3 loader builds1.21.7
3 loader builds1.21.6
3 loader builds1.21.5
3 loader buildsShowing the newest 12 of 16 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
JamLib versions and loaders
V2.0.0+1.21.11 (NeoForge 1.21.11)
jamlib-neoforge-2.0.0+1.21.11.jar
26 Apr 2026
V1.3.6+1.21.11 (NeoForge 1.21.11)
jamlib-neoforge-1.3.6+1.21.11.jar
16 Mar 2026
V1.3.5+1.21.11 (NeoForge 1.21.11)
jamlib-neoforge-1.3.5+1.21.11.jar
6 Jan 2026
Looking for an older file? The official CurseForge project page is in Resources.