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Lib 39Minecraft mod

Lib39 is a general-purpose dependency library for Minecraft mods.

client and server
Latest version
1.20.1-0.5.6
Minecraft
no version declared
Java
follows the game
Loaders
none declared
Licence
MIT
Downloads
14.0k
Updated
5 mo ago
Available on
Modrinth
Space NodeOur hosting

Host Lib 39 servers

One click and Lib 39 is installed with the right loader, on hardware built for it.

  • One click mod install
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  • NVMe SSD
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Download

From Lib 39’s own host. Nothing is re-hosted here.

1.20.1-0.5.6release19 Apr 2026

lib39-forge-1.20.1-0.5.6.jar · 1.1 MB · for 1.20.1

Download latest
73028a07e5fc…
Older versions6
  • 1.20.1-0.4.126 Feb 20261.20.11.2 MB3.6k downloads8050a2dcb7c0…Get
  • 1.20.1-0.3.617 Feb 20261.20.11.2 MB743 downloads92fe9dfe98db…Get
  • 1.20.1-0.1.924 Jan 20261.20.11.2 MB3.0k downloads0c4ab7f7eadf…Get
  • 1.21.11-0.0.1610 Dec 20251.21.110.8 MB97 downloadsaa07f3cfecc8…Get
  • 1.21.10-0.0.161 Nov 20251.21.100.8 MB55 downloadsd79223533a5f…Get
  • 1.20.1-0.0.1725 Oct 20251.20.10.8 MB111 downloadseb5457b0028a…Get

Frequently asked

Do I need to install Lib 39 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.

What licence is Lib 39 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 Lib 39?

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 Lib 39 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.

Which Minecraft versions does Lib 39 work on?

The author has not declared a supported version in the metadata we sync, so there is nothing here we can state as fact. Check the project's own page before installing it, and treat an old mod with no declared version as untested on modern Minecraft.

Details from Modrinth, where the author last updated it on 19 Apr 2026. We do not host files and we do not republish descriptions; every download link points at the author’s own release.

Not indexed yet. Score 52 against a threshold of 55. The page still exists and is still linked; it simply carries noindex until we hold more.

Is this information wrong or missing something? .