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mod

LibrarianLibMinecraft mod for 1.21.1

An extensive collection of tools, utilities, and frameworks.

newest supported release 1.21.1Library Api
Latest version
librarianlib-5.0.0-fabric
Minecraft
1.10 to 1.21.1
Java
Java 21+
Loaders
NeoForge, Fabric
Licence
not stated
Downloads
31.6M
Updated
17 mo ago
Available on
CurseForge

Minecraft versions

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

Other mods
MinecraftThroughJavaEvidenceReleased
1.21.1NeoForge, Fabric21+declared8 Aug 2024
1.17.1Fabric, NeoForge16+declared6 Jul 2021
1.12.2Fabric, NeoForge8+declared18 Sept 2017
1.12.1Fabric, NeoForge8+declared3 Aug 2017
1.12Fabric, NeoForge8+declared2 Jun 2017
1.11.2Fabric, NeoForge8+declared21 Dec 2016
1.11.1Fabric, NeoForge8+declared20 Dec 2016
1.11NeoForge, Fabric8+declared14 Nov 2016
1.10.2Fabric, NeoForge8+declared23 Jun 2016
1.10.1Fabric, NeoForge8+declared22 Jun 2016
1.10Fabric, NeoForge8+declared8 Jun 2016

Download

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

Browse 40 indexed releases

For Minecraft 1.21.1

Choose the loader you use before downloading.

  • Fabric

    librarianlib-5.0.0-fabric · 10 Jun 2025 · librarianlib-5.0.0-fabric.jar

    Get Fabric

  • NeoForge

    librarianlib-5.0.0-neoforge · 10 Jun 2025 · librarianlib-5.0.0-neoforge.jar

    Get NeoForge

Most recently published release

librarianlib-5.0.0-fabricrelease10 Jun 2025

librarianlib-5.0.0-fabric.jar · 1.7 MB · for 1.21.1 · Fabric

Download this release
962ef739f8d6…
Older versions24
  • librarianlib-5.0.0-neoforge10 Jun 20251.21.11.7 MB1 downloade729d2a22f3c…Get
  • LibrarianLib 5.0.0-alpha.1012 Oct 20211.17.13.9 MB1.8k downloads393fadd7ec6d…Get
  • LibrarianLib 5.0.0-alpha.99 Oct 20211.17.13.9 MB142 downloads7b363cce0083…Get
  • LibrarianLib 5.0.0-alpha.89 Sept 20211.17.13.9 MB602 downloads01bebc38db4b…Get
  • LibrarianLib 5.0.0-alpha.75 Sept 20211.17.13.8 MB82.4k downloads3d025de1ff8e…Get
  • librarianlib-1.12.2-4.22.jar25 Aug 20201.12.238.8 MB16.1M downloadsf2e75d6899a2…Get
  • librarianlib-1.12.2-4.21.jar27 Jun 20201.12.238.8 MB881.8k downloadsb05ddea2da3f…Get
  • librarianlib-1.12.2-4.20.jar3 Dec 20191.12.238.8 MB3.0M downloads8cab3fe9c5cd…Get
  • librarianlib-1.12.2-4.19.216 Jun 20191.12.23.9 MB2.1M downloadsbf216828280d…Get
  • librarianlib-1.12.2-4.19.1-release.jar23 May 20191.12.2, 1.12.1, 1.123.9 MB161.9k downloadsa2fd5737b73e…Get
  • librarianlib-1.12.2-4.18.jar10 May 20191.12.23.8 MB115.5k downloadsea69ef7fc9a9…Get
  • librarianlib-1.12.2-4.17.jar29 Apr 20191.12.23.9 MB31.3k downloadsd712bbd3d1b5…Get
  • librarianlib-1.12.2-4.15.jar6 Sept 20181.12.2, 1.12.1, 1.123.1 MB1.8M downloads367ce36f483a…Get
  • librarianlib-1.12.2-4.12.jar9 Aug 20181.12.2, 1.12.1, 1.123.1 MB37.3k downloads3fa83cc88207…Get
  • librarianlib-1.12.2-4.11.jar22 Jul 20181.12.2, 1.12.1, 1.123.0 MB26.9k downloads903db3314a53…Get
  • librarianlib-1.12.2-4.9.jar2 Apr 20181.12.2, 1.12.1, 1.122.9 MB754.1k downloadsce8ce380945f…Get
  • librarianlib-1.12.2-4.8.jar16 Mar 20181.12.2, 1.12.1, 1.122.9 MB43.1k downloads8b1a5e359e28…Get
  • librarianlib-1.12.2-4.7.jar7 Feb 20181.12.22.6 MB70.6k downloads21bfda64922d…Get
  • librarianlib-1.12.2-4.6.jar31 Jan 20181.12.22.6 MB2.4k downloads6246148c730a…Get
  • librarianlib-1.12.2-4.5.1.jar27 Jan 20181.12.22.4 MB4.9k downloads335bc94553c6…Get
  • librarianlib-1.12.2-4.5.jar26 Jan 20181.12.22.4 MB3.4k downloads8dd981660015…Get
  • librarianlib-1.12.2-4.4.jar13 Jan 20181.12.22.3 MB72.7k downloadse52a7bea8a0b…Get
  • librarianlib-1.12-4.3.jar10 Dec 20171.12.2, 1.12.1, 1.122.4 MB68.7k downloads8e88e0d49743…Get
  • librarianlib-1.12-4.2.jar24 Nov 20171.12.2, 1.12.1, 1.122.3 MB29.7k downloadse7477a327d19…Get

Frequently asked

Does LibrarianLib work on Minecraft 1.21.1?

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

Everything the author has declared, from 1.10 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 LibrarianLib support?

NeoForge, 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 LibrarianLib?

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 LibrarianLib?

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 LibrarianLib 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 10 Jun 2025. 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? .