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KJLib Mod for Minecraft 1.12.2

The library mod for all my other mods.

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Updated 18.10.2026
  • 1.12.2

About the KJLib mod

This is a mod required for pretty much all of my mods and just contains useful code I can use across them all.

If you like what I do and want to support future projects you can find my Patreon here:

How to install KJLib

With Millida Launcher

  1. Install Millida Launcher

    The launcher is free: download it at millida.net/launcher and sign in with any nickname.

  2. Click “Install” on this page

    The launcher opens and installs the mod for Minecraft 1.12.2 automatically.

  3. Launch the game

    A profile with it appears in the launcher: click “Play”.

Manually

  1. Download the file for your version

    In the version list above, pick the file kjlib-1.0.4.jar (48 KB) for your game version.

  2. Put it in the mods folder

    The folder is inside .minecraft (Windows: %appdata%\.minecraft\mods). If it does not exist, create it.

  3. Launch the loader profile

    Open “Mods” in the main menu: KJLib should be in the list.

Minecraft 1.12.2 runs on Java 8: with a different Java version the game may close right after launch.

Versions

With dependencies

MinecraftLoaderFileDateActions
1.12.2—kjlib-1.0.4.jar48.2 KB

FAQ

Which Minecraft versions does KJLib work on?

Only Minecraft 1.12.2: there are no files for other versions.

Which Java does KJLib need?

Minecraft 1.12.2 runs on Java 8. If the game closes right after launch, the usual cause is the wrong Java version in the profile settings.

Where can I download KJLib safely?

On this page: the file kjlib-1.0.4.jar (48 KB) is stored on Millida’s server, with no link shorteners. SHA-1 checksum: 76fc35689b3bed522744a6e1a19a899d5c3cd7c9.

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