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Atlas LibMinecraft mod for 1.21.1

A library for shared code between minecraft mods.

client and servernewest supported release 1.21.1Library
Latest version
1.12.2-1.1.11
Minecraft
1.12.2 to 1.21.1
Java
Java 21+
Loaders
NeoForge, Forge
Licence
LGPL-2.1-only
Downloads
1.5M
Updated
5 mo ago
Available on
Modrinth
Space NodeOur hosting

Host Atlas Lib servers

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

  • 1.21.1
  • NeoForge
  • Forge
  • One click mod install
  • Loader matched for you
  • Ryzen CPUs
  • NVMe SSD
Deploy a serverFrom €0.90 per GB

Minecraft versions

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

Other mods
MinecraftThroughJavaEvidenceReleased
1.21.1NeoForge, Forge21+declared8 Aug 2024
1.21Forge, NeoForge21+declared13 Jun 2024
1.20.1NeoForge, Forge17+declared12 Jun 2023
1.20NeoForge, Forge17+declared2 Jun 2023
1.19.4NeoForge, Forge17+declared14 Mar 2023
1.19.3NeoForge, Forge17+declared7 Dec 2022
1.19.2NeoForge, Forge17+declared5 Aug 2022
1.18.2NeoForge, Forge17+declared28 Feb 2022
1.17.1Forge, NeoForge16+declared6 Jul 2021
1.16.5NeoForge, Forge8+declared14 Jan 2021
1.12.2NeoForge, Forge8+declared18 Sept 2017

Download

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

For Minecraft 1.21.1

Choose the loader you use before downloading.

  • NeoForge

    1.21-1.1.14 · 3 Jul 2024 · Atlas-Lib-1.21.0-1.1.14.jar

    Get NeoForge

Most recently published release

1.12.2-1.1.11release6 Jun 2026

Atlas-Lib-1.12.2-1.1.11.jar · 1.3 MB · for 1.12.2 · Forge

Download this release
9368277aa9c9…
Older versions13
  • 1.1.1024 Apr 20261.12.21.3 MB2.4k downloads5796dcbd0c0a…Get
  • 1.21-1.1.143 Jul 20241.21.1, 1.2191 KB44.3k downloads386fde446c14…Get
  • 1.20.1-1.1.1211 Apr 20241.20.1, 1.200.1 MB870.3k downloads98875598d4d2…Choose file on publisher ↗
  • 1.1.817 Nov 20231.19.40.1 MB41.1k downloads626503effd18…Get
  • 1.1.11a17 Nov 20231.20.1, 1.200.1 MB109.2k downloadsdda03842f490…Choose file on publisher ↗
  • 1.1.7a26 Apr 20231.18.20.1 MB744 downloadsaafbb0ec7bde…Get
  • 1.1.6b23 Mar 20231.19.4100 KB715 downloadsd8a00754b544…Get
  • 1.19.3-1.1.6a15 Feb 20231.19.3100 KB2.3k downloadsf3e46e8fceda…Get
  • 1.19.2-1.1.627 Dec 20221.19.295 KB85.8k downloadsb493b0f6c523…Get
  • 1.18.2-1.1.627 Dec 20221.18.20.1 MB303 downloadsdf17d14e0c58…Get
  • 1.17.1-1.1.327 Dec 20221.17.170 KB207 downloads8e3de4d9361f…Get
  • 1.16.5-1.1.3c27 Dec 20221.16.549 KB32.7k downloads11f2eda26e96…Get
  • 1.12.2-1.1.5a27 Dec 20221.12.20.1 MB343.4k downloads24aec83be139…Get

Frequently asked

Does Atlas Lib work on Minecraft 1.21.1?

Yes. 1.21.1 is the newest Minecraft version Atlas Lib 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 Atlas Lib support?

Everything the author has declared, from 1.12.2 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 Atlas Lib on the client or the server?

Both. Every player needs it installed and so does the server, so anyone joining without it will be refused.

Which platform or loader does Atlas Lib support?

NeoForge, 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 Atlas Lib?

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.

What licence is Atlas Lib under?

LGPL-2.1-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 Atlas Lib?

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 Atlas Lib 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. 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.

GeckoLibA 3D animation library for entities, blocks, items, armor, and more!BookshelfAn open source library for other mods!Cloth Config API (Fabric/Forge/NeoForge)Config Screen API for MinecraftJourneyMapReal-time map used for mapping in-game or your browser as you explore.Architectury APIAn intermediary api aimed to ease developing multiplatform mods.Jade 🔍Shows information about what you are looking at. (Hwyla/WAILA fork for Minecraft 1.16+)

Used by

1 project lists Atlas Lib as a required dependency.

The HordesAdds monster hordes invasions and zombie infection.

Details from Modrinth, where the author last updated it on 6 Jun 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? .