How do I install XunLib?

Install the matching mod loader (Forge, Fabric or NeoForge) for your Minecraft version. Download the .jar. Put it in the .minecraft/mods folder and launch that loader profile. Opens on Modrinth — not every file is mirrored on our own servers.

What Minecraft version does XunLib work with?

The listing gives Minecraft 1.21, 1.21.1. This is the version stated by the author or source site, not something we verified ourselves.

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XunLib

by Xun · on Modrinth

Which build do you need?

This mod ships a separate file for every mod loader and every version of the game. Pick both, then download — the wrong build installs fine and then does nothing in the game.

Mod loader

Mod loader Fabric2 builds
Mod loader Forge1 build
Mod loader NeoForge1 build

Minecraft version

Minecraft 1.21.1Newest
Minecraft 1.21

Minecraft 1.21–1.21.1Newest

Minecraft 1.21–1.21.1Newest

⬇ Download for 1.21.1 · Fabric ⬇ Download for 1.21 · Fabric ⬇ Download for 1.21–1.21.1 · Forge ⬇ Download for 1.21–1.21.1 · NeoForge

I don't know my version or loader

Open the Minecraft launcher and look at the profile you play on — it names both, like fabric-loader-1.21.4. The version also shows in the bottom-right corner of the game's main menu.

No loader in the profile name? Then it's plain Minecraft, and these mods won't run — you need Fabric or NeoForge installed first.

Open in MC Java Mods Get it on Google Play →

Overview

XunLib is a lightweight yet powerful utility library designed to simplify mod development by handling repetitive tasks and offering robust, reusable systems. From inventory management to spatial tools, it provides flexible APIs to minimize boilerplate.

Features

Inventory Utilities

Insert/extract items, validate stacks, and check container states.
Armor slot validation for materials/types.
Convert grid positions to slot indices.

Fuzzy Item Matching

Compare items by count, enchantments, or custom properties.
Configurable ignore rules (e.g., ignore durability or Data components).

Smart Effect Application

Intelligently extend/upgrade existing effects or apply new ones.

Color & Spatial Tools

Convert between RGB/HSL/HSV and blend colors dynamically.
Generate shapes (discs, spheres, hollow cubes) and check spatial bounds.

Registration System

Adding custom items, blocks, and entities in the common module to ease multi-loader development.

Quick facts

Edition: Minecraft Java
File type: .jar
Minecraft versions listed: 1.21, 1.21.1
How to install: Install the matching mod loader (Forge, Fabric or NeoForge) for your Minecraft version. → Download the .jar. → Put it in the .minecraft/mods folder and launch that loader profile.
Where to get it: Opens on Modrinth — not every file is mirrored on our own servers.

Install steps are the general flow for this file type — How to install Minecraft Java mods & modpacks walks through it step by step.

Verified by MCModsHub

Ships as xunlib-neoforge-1.21-2.1.5.jar — drop this file into the mods folder
Download size: 100 KB
Download link checked 31 Aug 2026 — working

These come from our own check of the pack file, not from the source page.

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