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modpack

FranciumMinecraft modpack for 1.21.9

Vanilla on Steroids. 5 months of research in order to bring you the BEST optimization and QoL mods. [Available for 1.21.9]

client onlynewest supported 1.21.9TechnologyOptimizationMagicLightweight
Latest version
1.0.1
Minecraft
1.21.4 to 1.21.9
Java
Java 21+
Loader
Fabric
Licence
MIT
Downloads
1.6k
Updated
11 mo ago
Available on
Modrinth
Space NodeOur hosting

Host Francium servers

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

  • 1.21.9
  • Fabric
  • One click modpack install
  • Dependencies handled
  • Tuned startup flags
  • 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 Francium declares support for, newest first, with the Java runtime that version needs.

Other modpacks
MinecraftThroughJavaEvidenceReleased
1.21.9Fabric21+declared30 Sept 2025
1.21.8Fabric21+declared17 Jul 2025
1.21.7Fabric21+declared30 Jun 2025
1.21.6Fabric21+declared17 Jun 2025
1.21.5Fabric21+declared25 Mar 2025
1.21.4Fabric21+declared3 Dec 2024

Download

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

1.0.1release22 Oct 2025

Francium 1.21.9 1.0.1.mrpack · 0.1 MB · for 1.21.9

Download latest
f83440421d9f…
Older versions2
  • 1.0.010 Oct 20251.21.90.1 MB36 downloads5053b39f3c34…Get
  • 1.0.220 Sept 20251.21.50.1 MB219 downloads4cdae8c67fc4…Get

Frequently asked

Does Francium work on Minecraft 1.21.9?

Yes. 1.21.9 is the newest Minecraft version Francium 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 Francium support?

Everything the author has declared, from 1.21.4 up to 1.21.9. The full list is in the table above, with the Java runtime each version needs next to it.

Do I need to install Francium 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 Francium 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 Francium?

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

What licence is Francium 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 Francium?

Use a launcher that imports packs, such as Prism Launcher, the Modrinth App or the CurseForge app, and open the pack file with it. The launcher installs the right loader and mods for you; installing a pack's mods by hand is the error-prone way.

Where do I download Francium 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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Last checked 2 mo ago against Modrinth. We do not host files and we do not republish descriptions; every download link points at the author’s own release.

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