Minecraft Java 1.21 Mods
Browse 79 free mods for Minecraft Java 1.21 — popular picks include PineLib, BL Screenshot Gallery [BLSG], ModernTabs.
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PineLib
A modern minecraft plugin library designed with simplicity in mind.
![BL Screenshot Gallery [BLSG]](https://pub-2ae937f770284535a96c3330f91236aa.r2.dev/thumb/modrinth/105747.webp)
BL Screenshot Gallery [BLSG]
A modern in-game screenshot gallery for Minecraft that automatically saves where, when, and what biome every screenshot was taken in, with a clean visual browser directly inside Minecraft.
ModernTabs
A standalone, cross-platform library that makes creative mode tabs more customizable
Zyntra
Zyntra is a Fabric Minecraft mod that turns your game into a server management hub with an integrated dashboard to create, control, and monitor servers through a fast and modern interface.
LobbyLink
The modern voting and server listing project!
InstaKeystrokes
A clean and customizable keystrokes HUD mod for Fabric 1.21.4 with draggable UI, color customization, and a modern design.
Tenreg
A registration tool for modern Minecraft
Modmc
A highly optimized, zero-dependency, and incredibly accurate anti-cheat built natively on PacketEvents. Catch modern hackers instantly across versions 1.8 to 1.21.3 without punishing legitimate players.
LokaLib
Modern, performance-focused Minecraft datapack library with events, timers, utilities, and developer tools.
ClansbyPinsel
Modern and lightweight Minecraft clan plugin for Paper/Spigot featuring clan system, invites, ranks, clan chat, clan home, GUI menu and admin commands. Optimized for performance, fully configurable…
TritonAC
An optimized, packet-based solution to block modern combat and movement exploits. Powered by Aquaqa.
VoxelUI
Modern UI framework for Minecraft NeoForge with XML layouts, MCSS styling, reusable components, theming, and developer tooling.
LuaCord
Write real Minecraft plugins in Lua. LuaCord is a modern fork of Lukkit, rewritten in Kotlin with full Paper compatibility.
Grimm's Mod Base
Base mod for the Grimm's modernized series, now including lattes (?). General content expansion and adventure mod.
AuctionX
A modern, fully customizable auction house plugin with per-rank limits, MySQL/SQLite storage, PlaceholderAPI & Discord integration, and a fully editable English messages.yml.
BSLib
BSLib Library aims to eliminate boilerplate code, streamline development workflows, and introduce modern reactive programming paradigms to the Minecraft ecosystem.
Ultimate Step
UltimateStep is an all-in-one Paper server management plugin featuring a powerful rank system, configurable scoreboard, customizable tablist, and complete punishment tools including warn, mute, ban, kick, unmute, and unban. Lightweight, modern, and easy
StaffUI
A fully customizable modern staff punishment panel featuring Discord log support, Hex colors, and ItemsAdder compatibility.
VoxCore (ChatCore)
A modern and fully customizable chat system for Minecraft, built to manage every aspect of player communication.
RefineryCore
A modern Paper plugin framework providing annotation-driven commands, GUIs, and configuration — built for the Refinery Team.
VConomy
A modern, lightweight, multi-currency economy plugin for Minecraft
AGF-Economy | Modern Economy System with Vault & PAPI (1.21)
Fast, modular and scalable economy system with Vault & PlaceholderAPI support
Slipstream
Ultra-fast, zero-allocation packet framework for Paper 1.21+. Coroutine-first, ProtocolLib-style API for modern Kotlin developers.
GideonLobby
A modern and modular lobby framework built for Paper servers.
Modern Industrialization Multiblock Editor
Customize Modern Industrialization multiblocks with KubeJS
CommandLib
Modern command framework for Minecraft plugins designed to simplify the creation and management of commands in recent Minecraft versions.
⭐ ZenithCore ⭐ | The Ultimate Framework for Paper Servers | Quest • GUI • API • Hooks
Modern all-in-one framework for Paper 1.21+ featuring modular systems, powerful API, plugin hooks an
MonolithAPI
A modern API for creating custom blocks on Paper servers
Voltaic API Mod (1.21.1, 1.20.1) – Dependency For Electrodynamics And Nuclear Science
Voltaic API Mod designed to unify and support multiple mods. It replaces older dependencies and ensures smooth integration across industrial, nuclear, and military‑style mods, all aimed at recreating the Voltz experience for newer Minecraft versions. Features: Required for Electrodynamics, Nuclear Science, Assembly Line, Ballistix, Blastcraft, MFFS, ICBM, and more. Central to the effort of modernizing […]
MaLiLib Update Port Mod (1.21.11, 1.21.1) – Essential Mod Support
MaLiLib Update Port Mod provides shared systems such as keybind handling, configuration menus, GUI rendering, and utility functions. Features: Required library for mods like Litematica. Handles config menus, keybindings, GUI screens, and more. Originally made for LiteLoader, now ported for Fabric and modern MC. MaLiLib Update Port Mod Download Links For Minecraft 1.21.11 Fabric version: […]
Light Level 2025 Mod (1.21.8, 1.21.5) – See Light Levels Above Every Block
Light Level 2025 Mod displays the block light level directly above solid blocks-allowing players to instantly assess mob-spawning risks visually. Inspired by Parzivail’s legacy LightLevel mod, it introduces improved performance, modern color rules, and convenient configuration. Features: Press F9 to see the block light levels Screenshots: Requires: Fabric API Light Level 2025 Mod Download Links […]
Renderer Fabric (1.21.1, 1.20.1) – Rendering Library for Modern Fabric
Renderer Fabric is part of the Fabric API, which is a lightweight and modular API designed for Minecraft mods. It provides common hooks and intercompatibility measures for mods using the Fabric toolchain. The Renderer Fabric Mod specifically deals with advanced rendering effects and optimizations, making it compatible with various optimization mods and graphics overhaul mods. […]
Aquamarine
A Modern Industrialization-like multiblock library.
WorldWeaver: Remastered
WorldWeaver Remastered is a powerful modern API and world generation library! As the successor to BCLib, it provides the essential framework for BetterEnd and BetterNether, fixing core terrain bugs and unlocking advanced data-driven dimensions!
BCLib: Remastered
BCLib Remastered is a powerful core library and API for Minecraft Fabric 1.21.1. It provides essential shared utilities, rendering tools, custom configs, and procedural models for BetterEnd and BetterNether. Specially optimized for modern modpacks!
JEHibernate
Modern Java 17+ Hibernate/JPA utility library, zero-config repositories, session-scoped lazy loading