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SubstrateMinecraft mod for 1.21.11

Optimization of the bottom and/or top layer(s) of the world

client onlynewest supported release 1.21.11Optimization
Latest version
4.2
Minecraft
1.20.1 to 1.21.11
Java
Java 21+
Loaders
Quilt, NeoForge, Fabric
Licence
LGPL-3.0-only
Downloads
187.4k
Updated
9 mo ago
Available on
Modrinth

Minecraft versions

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

Other mods
MinecraftThroughJavaEvidenceReleased
1.21.11Quilt, NeoForge, Fabric21+declared9 Dec 2025
1.21.10Fabric, Quilt, NeoForge21+declared7 Oct 2025
1.21.9NeoForge, Quilt, Fabric21+declared30 Sept 2025
1.21.8Fabric, Quilt, NeoForge21+declared17 Jul 2025
1.21.7Quilt, NeoForge, Fabric21+declared30 Jun 2025
1.21.6Fabric, Quilt, NeoForge21+declared17 Jun 2025
1.21.5NeoForge, Quilt, Fabric21+declared25 Mar 2025
1.21.4NeoForge, Quilt, Fabric21+declared3 Dec 2024
1.21.3NeoForge, Fabric, Quilt21+declared23 Oct 2024
1.21.2Quilt, NeoForge, Fabric21+declared22 Oct 2024
1.21.1Fabric, Quilt, NeoForge21+declared8 Aug 2024
1.20.6NeoForge, Quilt, Fabric21+declared29 Apr 2024
1.20.5NeoForge, Quilt, Fabric21+declared23 Apr 2024
1.20.4NeoForge, Quilt, Fabric17+declared7 Dec 2023
1.20.3NeoForge, Quilt, Fabric17+declared4 Dec 2023
1.20.2NeoForge, Quilt, Fabric17+declared20 Sept 2023
1.20.1NeoForge, Quilt, Fabric17+declared12 Jun 2023

Download

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

Browse 34 indexed releases

For Minecraft 1.21.11

Choose the loader you use before downloading.

  • NeoForge

    4.2 · 12 Feb 2026 · substrate-4.2+1.21.11-neoforge.jar

    Get NeoForge

  • Fabric

    4.1-Beta.4 · 19 Dec 2025 · substrate-4.1-Beta.4+1.21.11-fabric.jar

    Get Fabric

Most recently published release

4.2release12 Feb 2026

substrate-4.2+1.21.11-neoforge.jar · 80 KB · for 1.21.11 · NeoForge

Download this release
41dd130454b8…
Older versions24
  • 4.114 Jan 20261.21.1178 KB628 downloadsb1caa59d65cf…Get
  • 4.1-Beta.419 Dec 20251.21.1179 KB2.5k downloads5aaacb2c44ed…Get
  • 4.1-Beta.319 Dec 20251.21.1178 KB6.8k downloadsf0f7b141e84d…Get
  • 4.1-Beta.25 Nov 20251.21.8, 1.21.7, 1.21.6, 1.21.5, 1.21.4 +3 more13 KB474 downloads60c18a8167ab…Get
  • 4.1-Beta.15 Nov 20251.21.10, 1.21.978 KB275 downloads6a089c1b4317…Choose file on publisher ↗
  • 4.0-hf11 Oct 20251.20.6, 1.20.5, 1.20.4, 1.20.3, 1.20.2 +1 more0.4 MB3.1k downloadsde8c273cea0c…Choose file on publisher ↗
  • 4.011 Oct 20251.20.6, 1.20.5, 1.20.4, 1.20.3, 1.20.2 +1 more0.4 MB597 downloads7cbd07a79018…Choose file on publisher ↗
  • 4.0.15 Oct 20251.21.10, 1.21.90.4 MB14.7k downloadsb0926f61f31b…Choose file on publisher ↗
  • 3.530 Sept 20251.21.90.4 MB146 downloadsbb50e986498a…Choose file on publisher ↗
  • 3.4.2-Special-Embeddium-Build11 Sept 20251.21.4, 1.21.111 KB280 downloads0d4c7987e953…Get
  • 3.4.2-NeoForge1.21.x7 Sept 20251.21.8, 1.21.7, 1.21.6, 1.21.5, 1.21.4 +3 more11 KB871 downloads068e7f3b3262…Get
  • 3.4.2-NeoForge1.20.67 Sept 20251.20.611 KB49 downloadscd72133e5aa9…Get
  • 3.4.2-NeoForge1.20.47 Sept 20251.20.5, 1.20.410 KB71 downloads5032763b588c…Get
  • 3.4.1-NeoForge1.21.x7 Sept 20251.21.8, 1.21.7, 1.21.6, 1.21.5, 1.21.4 +3 more10 KB43 downloads1ce2f5db7a48…Get
  • 3.4.1-NeoForge1.20.67 Sept 20251.20.611 KB25 downloads2b9051b9722b…Get
  • 3.4.1-NeoForge1.20.47 Sept 20251.20.5, 1.20.410 KB26 downloads057e357f7887…Get
  • 3.4-NeoForge1.21.x29 Aug 20251.21.8, 1.21.7, 1.21.6, 1.21.5, 1.21.4 +3 more10 KB555 downloadsfc4994ab1cb8…Get
  • 3.4-Fabric1.21.x29 Aug 20251.21.8, 1.21.7, 1.21.6, 1.21.5, 1.21.4 +3 more0.4 MB3.9k downloadsdaba4091637c…Choose file on publisher ↗
  • 3.4-NeoForge1.20.629 Aug 20251.20.611 KB24 downloads1e51163d13b5…Get
  • 3.4-NeoForge1.20.429 Aug 20251.20.5, 1.20.410 KB28 downloadsbfbf8323e307…Get
  • 3.4-Fabric1.20.x29 Aug 20251.20.6, 1.20.5, 1.20.4, 1.20.3, 1.20.2 +1 more0.4 MB526 downloads71e2d1998f74…Choose file on publisher ↗
  • 3.3-NeoForge1.20.48 Aug 20251.20.5, 1.20.412 KB57 downloadsa5a7d26d4056…Get
  • 3.3-NeoForge1.21.x8 Aug 20251.21.8, 1.21.7, 1.21.6, 1.21.5, 1.21.4 +3 more12 KB1.0k downloads6ae96c1524d8…Get
  • 3.3-Fabric1.21.x8 Aug 20251.21.8, 1.21.7, 1.21.6, 1.21.5, 1.21.4 +3 more0.4 MB5.9k downloads438454112a72…Choose file on publisher ↗

Frequently asked

Does Substrate work on Minecraft 1.21.11?

Yes. 1.21.11 is the newest Minecraft version Substrate 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 Substrate support?

Everything the author has declared, from 1.20.1 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 Substrate on the client or the server?

The client only. There is nothing to install on the server side. That is the author's declared design, not a guarantee for every server: one running anti-cheat or missing a counterpart mod can still object.

Which platform or loader does Substrate support?

Quilt, NeoForge, Fabric. 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 Substrate?

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 Substrate under?

LGPL-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 Substrate?

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 Substrate 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 12 Feb 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? .