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CobbleboostMinecraft mod for 1.21.1

CobbleBoost is a client-side Fabric mod for Minecraft 1.21.1 that optimizes performance when playing with Cobblemon 1.7.

client onlynewest supported 1.21.1OptimizationManagement
Latest version
1.1.2
Minecraft
1.21.1
Java
Java 21+
Loader
Fabric
Licence
MIT
Downloads
5.9k
Updated
20 d ago
Available on
Modrinth

Minecraft versions

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

Other mods
MinecraftThroughJavaEvidenceReleased
1.21.1Fabric21+declared8 Aug 2024

Download

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

1.1.2release31 Mar 2026

cobbleboost-1.1.2.jar · 54 KB · for 1.21.1

Download latest
d8f39739c3f9…
Older versions4
  • 1.1.128 Mar 20261.21.154 KB158 downloads540088a020e2…Get
  • 1.1.020 Mar 20261.21.154 KB304 downloads19fb1b37581c…Get
  • 1.0.117 Mar 20261.21.148 KB96 downloads850ba99af282…Get
  • 1.0.013 Mar 20261.21.148 KB19 downloads5dedfefabe81…Get

Frequently asked

Does Cobbleboost work on Minecraft 1.21.1?

Yes. 1.21.1 is the newest Minecraft version Cobbleboost 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 Cobbleboost 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 Cobbleboost support?

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 Cobbleboost?

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 Cobbleboost 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 Cobbleboost?

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 Cobbleboost 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 13 Sept 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? .