plugin
Slimefun UnitedMinecraft plugin for 1.21.11
A modern and organised continuation of Slimefun’s legacy. Slimefun United transforms your server into a modpack-like experience with backpacks, jetpacks, reactors, electricity, automation and countless new systems.
- Latest version
- 4.10-alpha-19+050decd
- Minecraft
- 1.19 to 1.21.11
- Java
- Java 21+
- Platforms
- Purpur, Paper
- Licence
- GPL-3.0-only
- Downloads
- 2.3k
- Updated
- 8 mo ago
- Available on
- Modrinth
Our hostingHost Slimefun United servers
One click and Slimefun United is installed on a Paper or Purpur server built for it.
- 1.21.11
- Purpur
- Paper
- One click plugin install
- Paper and Purpur ready
- Automatic updates
- NVMe SSD
Minecraft versions
Every version Slimefun United declares support for, newest first, with the Java runtime that version needs.
| Minecraft | Through | Java | Evidence | Released |
|---|---|---|---|---|
| 1.21.11 | Purpur, Paper | 21+ | declared | 9 Dec 2025 |
| 1.21.10 | Purpur, Paper | 21+ | declared | 7 Oct 2025 |
| 1.21.9 | Paper, Purpur | 21+ | declared | 30 Sept 2025 |
| 1.21.8 | Purpur, Paper | 21+ | declared | 17 Jul 2025 |
| 1.21.7 | Purpur, Paper | 21+ | declared | 30 Jun 2025 |
| 1.21.6 | Purpur, Paper | 21+ | declared | 17 Jun 2025 |
| 1.21.5 | Purpur, Paper | 21+ | declared | 25 Mar 2025 |
| 1.21.4 | Purpur, Paper | 21+ | declared | 3 Dec 2024 |
| 1.21.3 | Purpur, Paper | 21+ | declared | 23 Oct 2024 |
| 1.21.2 | Purpur, Paper | 21+ | declared | 22 Oct 2024 |
| 1.21.1 | Purpur, Paper | 21+ | declared | 8 Aug 2024 |
| 1.21 | Paper, Purpur | 21+ | declared | 13 Jun 2024 |
| 1.20.6 | Purpur, Paper | 21+ | declared | 29 Apr 2024 |
| 1.20.5 | Purpur, Paper | 21+ | declared | 23 Apr 2024 |
| 1.20.4 | Paper, Purpur | 17+ | declared | 7 Dec 2023 |
| 1.20.3 | Purpur, Paper | 17+ | declared | 4 Dec 2023 |
| 1.20.2 | Purpur, Paper | 17+ | declared | 20 Sept 2023 |
| 1.20.1 | Paper, Purpur | 17+ | declared | 12 Jun 2023 |
| 1.20 | Purpur, Paper | 17+ | declared | 2 Jun 2023 |
| 1.19.4 | Purpur, Paper | 17+ | declared | 14 Mar 2023 |
| 1.19.3 | Paper, Purpur | 17+ | declared | 7 Dec 2022 |
| 1.19.2 | Purpur, Paper | 17+ | declared | 5 Aug 2022 |
| 1.19.1 | Purpur, Paper | 17+ | declared | 27 Jul 2022 |
| 1.19 | Purpur, Paper | 17+ | declared | 7 Jun 2022 |
Download
From Slimefun United’s own host. Nothing is re-hosted here.
For Minecraft 1.21.11
Choose the loader you use before downloading.
- Choose file on publisher ↗
Paper, Purpur
4.10-alpha-19+050decd · 3 Mar 2026
Multiple loaders are listed; verify the file before downloading.
Most recently published release
slimefun-united-4.10-alpha+050decd.jar · 7.2 MB · for 1.21.11, 1.21.10, 1.21.9, 1.21.8, 1.21.7 +19 more · Paper, Purpur
95d454610469…Older versions8Hide older versions
- 4.10-alpha-18+57cce0a3 Mar 20261.21.11, 1.21.10, 1.21.9, 1.21.8, 1.21.7 +19 more7.2 MB18 downloads
32252a05d163…Choose file on publisher ↗ - 4.10-alpha-17+22c38f531 Jan 20261.21.11, 1.21.10, 1.21.9, 1.21.8, 1.21.7 +19 more7.2 MB379 downloads
f223a5e5598d…Choose file on publisher ↗ - 4.10-alpha-16+c07117e31 Jan 20261.21.11, 1.21.10, 1.21.9, 1.21.8, 1.21.7 +19 more7.2 MB13 downloads
37720e146dac…Choose file on publisher ↗ - 4.10-alpha-15+f3c7d0630 Jan 20261.21.11, 1.21.10, 1.21.9, 1.21.8, 1.21.7 +19 more7.2 MB22 downloads
b33aa51e3d3e…Choose file on publisher ↗ - 4.10-alpha-14+472afd029 Jan 20261.21.11, 1.21.10, 1.21.9, 1.21.8, 1.21.7 +19 more7.2 MB15 downloads
e2679370f499…Choose file on publisher ↗ - 4.10-alpha-13+ad3cf9529 Jan 20261.21.11, 1.21.10, 1.21.9, 1.21.8, 1.21.7 +19 more7.2 MB10 downloads
5c02701fa801…Choose file on publisher ↗ - 4.10-alpha-12+e893ee729 Jan 20261.21.11, 1.21.10, 1.21.9, 1.21.8, 1.21.7 +19 more7.2 MB15 downloads
a970dd1ccb14…Choose file on publisher ↗ - 4.10-alpha-11+8e4ad0723 Jan 20261.21.11, 1.21.10, 1.21.9, 1.21.8, 1.21.7 +19 more7.2 MB66 downloads
533ed32b90f4…Choose file on publisher ↗
Frequently asked
Does Slimefun United work on Minecraft 1.21.11?
Yes. 1.21.11 is the newest Minecraft version Slimefun United 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 Slimefun United support?
Everything the author has declared, from 1.19 up to 1.21.11. The full list is in the table above, with the Java runtime each version needs next to it.
Do I need to install Slimefun United on the client or the server?
The server only. Players join with an ordinary Minecraft client and install nothing.
Which platform or loader does Slimefun United support?
Purpur, Paper. 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 Slimefun United?
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.
What licence is Slimefun United under?
GPL-3.0-only, as stated by the author on the platform we synced it from. Check the project's own page before redistributing or bundling it.
How do I install Slimefun United?
Choose the release variant for your server platform. Paper, Spigot, Purpur and Bukkit files go in the server's plugins folder; Fabric, Forge, NeoForge and Quilt files go in the mods folder. Restart after installing and check that the Minecraft version matches your server.
Where do I download Slimefun United safely?
Start with the author's page on Modrinth, 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.
Is this information wrong or missing something? .