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CubiumMinecraft mod for 1.21.4

A client-side Minecraft mod that integrates a Chromium-based browser directly into the game, allowing you to access websites without tabbing out.

client onlynewest supported 1.21.4UtilityManagementSocial
Latest version
1.1.3
Loader
Fabric
Licence
LGPL-3.0-or-later
Downloads
4.4k
Updated
11 mo ago
Available on
Modrinth

Screenshots

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

Minecraft versions

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

Other mods
MinecraftThroughJavaEvidenceReleased
1.21.4Fabric21+declared3 Dec 2024
1.21.3Fabric21+declared23 Oct 2024
1.21.2Fabric21+declared22 Oct 2024
1.21.1Fabric21+declared8 Aug 2024

Download

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

1.1.3release31 Oct 2025

cubium-1.1.3+1.21.1.jar · 0.2 MB · for 1.21.1

Download latest
206d33755595…
Older versions6
  • 1.1.229 Mar 20251.21.4, 1.21.3, 1.21.20.2 MB375 downloadsb1941a029ac2…Get
  • 1.1.124 Mar 20251.21.4, 1.21.3, 1.21.20.2 MB116 downloads1f2b87444e7f…Get
  • 1.1.01 Mar 20251.21.4, 1.21.3, 1.21.20.1 MB544 downloadsbdc0814e28e7…Get
  • 1.0.221 Feb 20251.21.4, 1.21.3, 1.21.20.1 MB289 downloads91898936c81b…Get
  • 1.0.117 Feb 20251.21.4, 1.21.3, 1.21.20.1 MB174 downloadsc01b48f471dd…Get
  • 1.0.010 Feb 20251.21.4, 1.21.3, 1.21.273 KB111 downloads48da497fcd86…Get

Frequently asked

Does Cubium work on Minecraft 1.21.4?

Yes. 1.21.4 is the newest Minecraft version Cubium 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 Cubium support?

Everything the author has declared, from 1.21.1 up to 1.21.4. The full list is in the table above, with the Java runtime each version needs next to it.

Do I need to install Cubium 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 Cubium 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 Cubium?

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 Cubium under?

LGPL-3.0-or-later, 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 Cubium?

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 Cubium 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.

Details from Modrinth, where the author last updated it on 31 Oct 2025. 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? .