mod

StateObserverMinecraft mod for 1.21.1

A library for observing state changes.

newest supported release 1.21.1Utility Qol Library Api

Latest version: stateobserver-neoforge-1.21.1-1.6.4.jar
Minecraft: 1.18.2 to 1.21.1
Java: Java 21+
Loaders: NeoForge, Fabric, Forge, Quilt
Licence: not stated
Downloads: 4.3M
Updated: 10 mo ago
Available on: CurseForge

Minecraft versions

Every version StateObserver declares support for, newest first, with the Java runtime that version needs.

Minecraft	Through	Java	Evidence	Released
1.21.1	NeoForge, Fabric, Forge, Quilt	21+	declared	8 Aug 2024
1.20.1	NeoForge, Fabric, Forge, Quilt	17+	declared	12 Jun 2023
1.19.2	NeoForge, Fabric, Forge, Quilt	17+	declared	5 Aug 2022
1.18.2	NeoForge, Fabric, Forge, Quilt	17+	declared	28 Feb 2022

Download

From StateObserver’s own host. Nothing is re-hosted here.

Browse 36 indexed releases

For Minecraft 1.21.1

Choose the loader you use before downloading.

NeoForge
stateobserver-neoforge-1.21.1-1.6.4.jar · 20 Dec 2025 · stateobserver-neoforge-1.21.1-1.6.4.jar
Get NeoForge
Fabric
stateobserver-fabric-1.21.1-1.6.4.jar · 20 Dec 2025 · stateobserver-fabric-1.21.1-1.6.4.jar
Get Fabric
Fabric, Quilt
stateobserver-fabric-1.21.1-1.5.1.jar · 7 Nov 2024
Multiple loaders are listed; verify the file before downloading.
Choose file on publisher ↗

Most recently published release

stateobserver-neoforge-1.21.1-1.6.4.jarrelease20 Dec 2025

stateobserver-neoforge-1.21.1-1.6.4.jar · 14 KB · for 1.21.1 · NeoForge

Download this release

97223bb9d809…

Older versions24

stateobserver-fabric-1.21.1-1.6.4.jar20 Dec 20251.21.115 KB8 downloadsd3a94c214666…Get
stateobserver-neoforge-1.21.1-1.6.3.jar22 Jun 20251.21.114 KB182 downloadsb783697be3cb…Get
stateobserver-fabric-1.21.1-1.6.3.jar22 Jun 20251.21.115 KBd7f2af23b0cf…Get
stateobserver-neoforge-1.21.1-1.6.2.jar22 Jun 20251.21.114 KB563e577ef673…Get
stateobserver-fabric-1.21.1-1.6.2.jar22 Jun 20251.21.115 KB730d64a4cbe1…Get
stateobserver-neoforge-1.21.1-1.6.1.jar12 May 20251.21.113 KB206 downloadsc5a1633c1ed4…Get
stateobserver-fabric-1.21.1-1.6.1.jar12 May 20251.21.114 KB145 downloads362a590a4562…Get
stateobserver-neoforge-1.21.1-1.6.0.jar12 May 20251.21.113 KB21 downloads99b8fd242b52…Get
stateobserver-fabric-1.21.1-1.6.0.jar12 May 20251.21.114 KB8 downloadsa5cf333a50b3…Get
stateobserver-fabric-1.20.1-1.4.3.jar11 Dec 20241.20.113 KB8.9k downloadsf243afd1975c…Get
stateobserver-forge-1.20.1-1.4.3.jar11 Dec 20241.20.113 KB133.3k downloadsd5f3d3a970bb…Get
stateobserver-neoforge-1.21.1-1.5.4.jar11 Dec 20241.21.112 KB42.5k downloads738e213f13e7…Get
stateobserver-fabric-1.21.1-1.5.4.jar11 Dec 20241.21.113 KB8.8k downloads4aecf1c4b2d0…Get
stateobserver-fabric-1.21.1-1.5.3.jar9 Nov 20241.21.113 KB1.1k downloads53f46cf13948…Get
stateobserver-neoforge-1.21.1-1.5.3.jar9 Nov 20241.21.112 KB809 downloads3e5f49a4ee87…Get
stateobserver-fabric-1.21.1-1.5.2.jar7 Nov 20241.21.113 KB55 downloads53016c8252cb…Get
stateobserver-neoforge-1.21.1-1.5.2.jar7 Nov 20241.21.112 KB73 downloads95ee19a207ed…Get
stateobserver-fabric-1.21.1-1.5.1.jar7 Nov 20241.21.113 KB15 downloads5008ed445dca…Choose file on publisher ↗
stateobserver-neoforge-1.21.1-1.5.1.jar7 Nov 20241.21.112 KB11 downloads346b9fb17dd4…Get
stateobserver-fabric-1.21.1-1.5.0.jar4 Nov 20241.21.113 KB13 downloadsdaf6ea12a36a…Choose file on publisher ↗
stateobserver-neoforge-1.21.1-1.5.0.jar4 Nov 20241.21.112 KB16 downloadscaef3f93f659…Get
stateobserver-fabric-1.20.1-1.4.2.jar1 Jun 20241.20.113 KB8.5k downloads0ed488dc6824…Choose file on publisher ↗
stateobserver-forge-1.20.1-1.4.2.jar1 Jun 20241.20.113 KB134.2k downloadsed6a1ba29788…Choose file on publisher ↗
StateObserver-fabric-1.20.1-1.4.0.jar18 Apr 20241.20.111 KB260 downloads89aa2c542907…Get

Frequently asked

Does StateObserver work on Minecraft 1.21.1?

Yes. 1.21.1 is the newest Minecraft version StateObserver declares support for, and the claim comes from the author's own release metadata rather than from a compatibility list somebody maintains by hand.

Which Minecraft versions does StateObserver support?

Everything the author has declared, from 1.18.2 up to 1.21.1. The full list is in the table above, with the Java runtime each version needs next to it.

Which platform or loader does StateObserver support?

NeoForge, Fabric, Forge, Quilt. A build for one platform or loader will not necessarily load on another, so this is the first thing to check before the Minecraft version.

Which Java version do I need for StateObserver?

Among the supported Minecraft releases above, the highest recorded requirement is Java 21 or newer. Use the requirement for the exact Minecraft version you run; previews and snapshots may differ.

How do I install StateObserver?

Install the matching loader first, then put the downloaded file in your mods folder and start the game. The loader, the mod and Minecraft all have to be on the same version, which is the usual reason a mod does not appear in game.

Where do I download StateObserver safely?

Start with the author's page on CurseForge, which is where the data here is synced from. MCReference does not host or repackage files. When available, recorded download links go to the source for that release; verify the publisher, filename and any available checksum before running it.

Works on the same versions

Ordered by how much of the recent Minecraft version coverage overlaps, not by popularity.

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Is this information wrong or missing something? .