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CeruleanMinecraft mod for 1.21.1

Advancements optimization mod, updated fork of Icterine with added features

server onlynewest supported 1.21.1Optimization
Latest version
fabric-1.21.1-1.0.0
Loaders
NeoForge, Fabric, Forge
Licence
GPL-3.0-only
Downloads
2.1M
Updated
16 mo ago
Available on
Modrinth
Space NodeOur hosting

Host Cerulean servers

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

  • 1.21.1
  • NeoForge
  • Fabric
  • Forge
  • One click mod install
  • Loader matched for you
  • Ryzen CPUs
  • 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 Cerulean declares support for, newest first, with the Java runtime that version needs.

Other mods
MinecraftThroughJavaEvidenceReleased
1.21.1NeoForge, Fabric, Forge21+declared8 Aug 2024
1.20.1Forge, Fabric, NeoForge17+declared12 Jun 2023
1.20Fabric, NeoForge, Forge17+declared2 Jun 2023

Download

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

fabric-1.21.1-1.0.0release3 May 2025

cerulean-fabric-1.0.0-1.21.1.jar · 0.9 MB · for 1.21.1

Download latest
ad7ff28c9dbb
Older versions3
  • forge-1.20.1-1.0.03 May 20251.20, 1.20.10.5 MB1.1M downloads7a1cf8ff7d5bGet
  • fabric-1.20.1-1.0.03 May 20251.20, 1.20.10.7 MB269.1k downloads0be9fb52cd61Get
  • neoforge-1.21.1-1.0.03 May 20251.21.10.3 MB604.4k downloadsf9808b360746Get

Frequently asked

Does Cerulean work on Minecraft 1.21.1?

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

Everything the author has declared, from 1.20 up to 1.21.1. The full list is in the table above, with the Java runtime each version needs next to it.

Do I need to install Cerulean on the client or the server?

The server only. Players join with an ordinary Minecraft client and install nothing.

Which platform or loader does Cerulean support?

NeoForge, Fabric, Forge. 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 Cerulean?

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 Cerulean under?

GPL-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 Cerulean?

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 Cerulean 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.

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.

Is this information wrong or missing something? .