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MemGuardMinecraft mod for 1.21.11

Reduces RAM usage in large modpacks and servers by caching NBT strings, monitoring memory usage, and triggering garbage collection at optimal times.

newest supported 1.21.11Optimization
Latest version
1.0.4
Minecraft
1.20 to 1.21.11
Java
Java 21+
Loaders
NeoForge, Forge, Fabric
Licence
LicenseRef-All-Rights-Reserved
Downloads
19.5k
Updated
4 mo ago
Available on
Modrinth
Space NodeOur hosting

Host MemGuard servers

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

  • 1.21.11
  • NeoForge
  • Forge
  • Fabric
  • One click mod install
  • Loader matched for you
  • Ryzen CPUs
  • NVMe SSD
Deploy a serverFrom €0.90 per GB

Minecraft versions

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

Other mods
MinecraftThroughJavaEvidenceReleased
1.21.11NeoForge, Forge, Fabric21+declared9 Dec 2025
1.21.10Fabric, NeoForge, Forge21+declared7 Oct 2025
1.21.9Forge, NeoForge, Fabric21+declared30 Sept 2025
1.21.8Forge, NeoForge, Fabric21+declared17 Jul 2025
1.21.7NeoForge, Forge, Fabric21+declared30 Jun 2025
1.21.6NeoForge, Forge, Fabric21+declared17 Jun 2025
1.21.5Fabric, NeoForge, Forge21+declared25 Mar 2025
1.21.4Forge, NeoForge, Fabric21+declared3 Dec 2024
1.21.3NeoForge, Fabric, Forge21+declared23 Oct 2024
1.21.2Forge, Fabric, NeoForge21+declared22 Oct 2024
1.21.1NeoForge, Forge, Fabric21+declared8 Aug 2024
1.21Fabric, NeoForge, Forge21+declared13 Jun 2024
1.20.6Forge, NeoForge, Fabric21+declared29 Apr 2024
1.20.5Forge, NeoForge, Fabric21+declared23 Apr 2024
1.20.4Forge, NeoForge, Fabric17+declared7 Dec 2023
1.20.3Forge, NeoForge, Fabric17+declared4 Dec 2023
1.20.2Forge, NeoForge, Fabric17+declared20 Sept 2023
1.20.1Forge, NeoForge, Fabric17+declared12 Jun 2023
1.20Forge, NeoForge, Fabric17+declared2 Jun 2023

Download

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

1.0.4release3 Jun 2026

memguard-1.0.4.jar · 2 KB · for 1.21.1

Download latest
8909578d329a…
Older versions2
  • 1.0.25 Apr 20261.21.11, 1.21.10, 1.21.9, 1.21.8, 1.21.7 +6 more8 KB1.4k downloads62b44e083710…Get
  • 1.0.33 Apr 20261.20.6, 1.20.5, 1.20.4, 1.20.3, 1.20.2 +2 more9 KB8.8k downloads87412a66f64c…Get

Frequently asked

Does MemGuard work on Minecraft 1.21.11?

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

Everything the author has declared, from 1.20 up to 1.21.11. The full list is in the table above, with the Java runtime each version needs next to it.

Which platform or loader does MemGuard support?

NeoForge, Forge, 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 MemGuard?

On the newest Minecraft version it supports, Java 21 or newer. The requirement comes from the Minecraft version you run rather than from the mod itself, so on an older supported Minecraft the answer is that version's Java, not this one.

What licence is MemGuard under?

LicenseRef-All-Rights-Reserved, 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 MemGuard?

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 MemGuard 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. The download link goes to the source recorded for that release; verify the publisher, filename and 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 3 Jun 2026. We do not host files and we do not republish descriptions; every download link points at the author’s own release.

Is this information wrong or missing something? .