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Server ExpansionMinecraft mod for 1.21.1

This is a server-side mod that implements some extended features for the server.

server onlynewest supported release 1.21.1UtilityOptimizationSocial
Latest version
1.1.1
Minecraft
1.21.1
Java
Java 21+
Loader
NeoForge
Licence
MIT
Downloads
42.5k
Updated
8 mo ago
Available on
Modrinth
Space NodeOur hosting

Host Server Expansion servers

One click and Server Expansion is installed with the right loader, on hardware built for it.

  • 1.21.1
  • NeoForge
  • One click mod install
  • Loader matched for you
  • Ryzen CPUs
  • NVMe SSD
Deploy a serverFrom €0.90 per GB

Screenshots

Click a screenshot to open it. Screenshots are served from the author’s own host and belong to them.

Minecraft versions

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

Other mods
MinecraftThroughJavaEvidenceReleased
1.21.1NeoForge21+declared8 Aug 2024

Download

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

Most recently published release

1.1.1release21 Mar 2026

server_expansion-1.1.1-neoforge-1.21.1.jar · 0.2 MB · for 1.21.1 · NeoForge

Download this release
115c5bb0d256…
Older versions3
  • 1.1.017 Mar 20261.21.10.2 MB146 downloadsa92f379f98b2…Get
  • 1.0.118 Aug 20251.21.10.1 MB39.3k downloadsfcb971be9b41…Get
  • 1.0.09 May 20251.21.10.1 MB414 downloads9b007d6dde16…Get

Frequently asked

Does Server Expansion work on Minecraft 1.21.1?

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

Do I need to install Server Expansion on the client or the server?

The server only. Players join with an ordinary Minecraft client and install nothing.

Which platform or loader does Server Expansion support?

NeoForge. 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 Server Expansion?

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 Server Expansion under?

MIT, 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 Server Expansion?

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 Server Expansion 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.

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Details from Modrinth, where the author last updated it on 21 Mar 2026. We do not host files or republish descriptions. Available download links point to the author’s own release.

Is this information wrong or missing something? .