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CthuLibMinecraft mod for 1.21.1

Core utility mod for Pixel Dream Studios modpacks

newest supported release 1.21.1Library Api
Latest version
CthuLib [FORGE] [1.20.1] - [1.1.0]
Minecraft
1.20.1 to 1.21.1
Java
Java 21+
Loaders
Forge, Fabric, NeoForge
Licence
not stated
Downloads
718.6k
Updated
9 d ago
Available on
CurseForge

Minecraft versions

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

Other mods
MinecraftThroughJavaEvidenceReleased
1.21.1Forge, Fabric, NeoForge21+declared8 Aug 2024
1.20.1Forge, Fabric, NeoForge17+declared12 Jun 2023

Download

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

Browse 29 indexed releases

For Minecraft 1.21.1

Choose the loader you use before downloading.

  • Fabric

    CthuLib [FABRIC] [1.21.1] - [1.1.0] · 29 Oct 2026 · cthulib-fabric-1.1.0.jar

    Get Fabric

  • NeoForge

    CthuLib [NEOFORGE] [1.21.1] - [1.1.0] · 29 Oct 2026 · cthulib-neoforge-1.1.0.jar

    Get NeoForge

Most recently published release

CthuLib [FORGE] [1.20.1] - [1.1.0]release29 Oct 2026

cthulib-forge-1.1.0.jar · 7.4 MB · for 1.20.1 · Forge

Download this release
e30d5710a0c8…
Older versions24
  • CthuLib [FABRIC] [1.20.1] - [1.1.0]29 Oct 20261.20.17.4 MB534448b1a4b9…Get
  • CthuLib [FABRIC] [1.21.1] - [1.1.0]29 Oct 20261.21.17.4 MBaafa1b7c3aef…Get
  • CthuLib [NEOFORGE] [1.21.1] - [1.1.0]29 Oct 20261.21.17.4 MBb28cf5c617b4…Get
  • CthuLib [FABRIC] [1.20.1] - [1.0.7]4 Aug 20261.20.17.4 MB7 downloads235760f0b39e…Get
  • CthuLib [FORGE] [1.20.1] - [1.0.7]4 Aug 20261.20.17.4 MB5f6bad1f9ba4…Get
  • Cthulib [1.20.1] [FORGE] - 1.0.67 Jul 20261.20.17.4 MB33.3k downloads8b2baca53170…Get
  • Cthulib [1.20.1] [FABRIC] - 1.0.67 Jul 20261.20.17.4 MBca93b78f4f48…Get
  • Cthulib [1.21.1] [FABRIC] - 1.0.67 Jul 20261.21.17.4 MB1f20c5c2726b…Get
  • Cthulib [1.21.1] [NEOFORGE] - 1.0.67 Jul 20261.21.17.4 MB66941fcdf85f…Get
  • Cthulib [1.20.1] [FORGE] - 1.0.56 Jul 20261.20.17.4 MB523 downloadsb2bba35e4164…Get
  • Cthulib [1.20.1] [FABRIC] - 1.0.56 Jul 20261.20.17.4 MBb3559a9b9f01…Get
  • Cthulib [1.21.1] [NEOFORGE] - 1.0.56 Jul 20261.21.17.4 MB49f88463c3aa…Get
  • Cthulib [1.21.1] [FABRIC] - 1.0.56 Jul 20261.21.17.4 MB0884a7b66939…Get
  • Cthulib [1.20.1] [FORGE] - 1.0.45 Jul 20261.20.17.4 MB558 downloadsfd6311972221…Get
  • Cthulib [1.20.1] [FABRIC] - 1.0.45 Jul 20261.20.17.4 MBbd0e6b2e80ec…Get
  • Cthulib [1.21.1] [FABRIC] - 1.0.45 Jul 20261.21.17.4 MBc1ee8cdeb4fc…Get
  • Cthulib [1.21.1] [NEOFORGE] - 1.0.45 Jul 20261.21.17.4 MBb4d1e74d6a92…Get
  • CthuLib [1.21.1] [NEOFORGE] - 1.0.36 Jun 20261.21.17.4 MB47c17e088046…Get
  • CthuLib [1.21.1] [FABRIC] - 1.0.36 Jun 20261.21.17.4 MB6f65b1cb71b6…Get
  • Cthulib [1.21.1] [NEOFORGE] - 1.0.218 Mar 20261.21.17.4 MB5 downloads2e906521a3b4…Get
  • Cthulib [1.21.1] [FABRIC] - 1.0.218 Mar 20261.21.17.4 MB26068d1bd165…Get
  • Cthulib [1.21.1] [NEOFORGE] - 1.0.117 Mar 20261.21.19.1 MB9 downloads54524a531e91…Get
  • CthuLib [1.21.1] [FABRIC] - 1.0.117 Mar 20261.21.19.1 MB1 download0932797fab9d…Get
  • CthuLib [1.21.1] [NEOFORGE] - 1.0.016 Dec 20251.21.11.8 MB66 downloads775b300dc044…Get

Frequently asked

Does CthuLib work on Minecraft 1.21.1?

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

Everything the author has declared, from 1.20.1 up to 1.21.1. The full list is in the table above, with the Java runtime each version needs next to it.

Which platform or loader does CthuLib support?

Forge, Fabric, NeoForge. 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 CthuLib?

Among the supported Minecraft releases above, the highest recorded requirement is Java 21 or newer. Use the requirement for the exact Minecraft version you run; previews and snapshots may differ.

How do I install CthuLib?

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 CthuLib safely?

Start with the author's page on CurseForge, which is where the data here is synced from. MCReference does not host or repackage files. When available, recorded download links go to the source for that release; verify the publisher, filename and any available 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 CurseForge, where the author last updated it on 29 Oct 2026. We do not host files or republish descriptions. Available download links point to the author’s own release.

Is this information wrong or missing something? .