Minecraft Java 1.21 Mods
Browse 510 free mods for Minecraft Java 1.21 — popular picks include Nice Pig Tweaks, XaerosMapPlugin, Chat Tweaks - Secure.
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Nice Pig Tweaks
Some nice additions to Pigs.
XaerosMapPlugin
Xaero's Map plugin is a lightweight plugin for servers using Xaero's Minimap and Xaero's World Map. The plugin prevents different worlds from sharing or overlapping map data, ensuring that every world maintains its own unique map.
Chat Tweaks - Secure
A lightweight client-side mod that filters chat messages by removing unwanted special characters and blocking custom words to help streamers and players keep their chat clean and readable.
CleanMaid
A configurable Minecraft cleanup utility mod.
denizen-utilities
Extending Denizen for greater capabilities
LoverMods
LoverMods is a utility mod for Lovercraft dedicated to making the server more together. The mod features farming, skin trading and other misc changes.
HitRangeActivity
A mod featuring visual enhancements and combat utilities (particles, PotFix, and sounds). A mod based on BetterHitReg, which has been modified for legitimate use. Base version 1.21.11
wand works
This mod adds new fun and interesting equipment and utilities to make the experience better
WindTweaks
Makes wind charges behave like the wind charges in spear mace on Minemen Club and more!

Villager Reputation Tweaks (Global Trades)
Gives several options for tweaking how villager reputations are managed for players on servers.
⚙️Create: Kinetic Waypoints
A Create addon that adds kinetic-powered waypoints and a mechanical fast travel network.
Easy Bee
A completly new way to trasport bees with extra tweaks
Cobblemon Black&White Battle Music
Adds music from Pokémon Black&White to Cobblemon battles
Wynncraft Acolyte QOL
Adds quality of life features for the Acolyte archetype in Wynncraft
CameraUtilities
Adds tweaks like Freelook, Zoom and Freecam to your game.
WaypointHomes
Adds Waypoints, a more balanced and in-world alternative to a /home system
Local Difficulty Utilities
Fixes local difficulty display on the client and syncs inhabited time from the server. Includes configs and commands to easily edit a chunks local difficulty.
F.Essentials
F.Essentials is a feature-rich mod for Fabric that brings essential server commands and utilities to Minecraft. Designed to make server management and player interaction easier.
trolling comand
Fake Player Events (Join/Leave/Kill/Kick) A fun utility mod for Fabric 1.20.1 that allows server administrators (or players with permissions) to send fake system messages to the chat. Perfect for pranks, roleplay, or testing chat layouts!
I Feel Bad
A lightweight and highly configurable Minecraft mod that tweaks death penalties, level-up experience requirements, and the default attributes of newly spawned entities
Colly SMP [NO LONGER UPDATING]
The Official Datapack used in the Colly SMP, no changes, no tweaks, THE REAL DEAL!
simpletweaks
A simple tweak mod. Customize your game with a wide range of tweaks.

Slashbridge
serverside utility mod aiming to add in minecraft commands that I think the base game lacks, bridging datapack and mod function.
TaTe's Food Tweaks
Makes Many More Items Consumable, Buffs a Few Existing Food Items, and Adds a Couple New Food Items!
Catter's Enchantment Tweaks
A Vanilla-friendly datapack that improves and rebalances the Vanilla enchantments, without adding any new ones of its own.
VR Wrist Mounted Map HUD
Vivecraft wrist mounted minimap
Tweaky
A collection of 90+ lightweight, toggleable, configurable vanilla tweaks.
more crafters
Adds new crafts and mechanics
NotHunt - No Compass Manhunt!
Minecraft Manhunt, Tracker over all dimensions (even The End), Alerts, Multiple runners, Numerous Objectives, Tweaks, WHAT ELSE DO YOU WANT?
tweakmoremore
This mod tweaks to (almost) every extent of Minecraft.
That Makes Sense
A collection of quality of life tweaks for Minecraft (neoforge & fabric)
Mandarin World
RU: Сканер мобов (ESP). Зажми ПКМ на 3 сек. Вкладки: Tools & Utilities. EN: Mob Scanner (ESP). Hold R-Click for 3 sec. Tab: Tools & Utilities.

Discovered Enough Items
Items are hidden from recipe viewers until they are discovered for the first time
Saltpeter Gunpowder
A vanilla-friendly, immersive, well researched gunpowder crafting mod with no feature creep and no world generation tweaks.
Happy-Yes-Wathe
[ZH] 为 Wathe 提供丰富的配置项,致力于打造更轻松阳光、可自定义的游戏体验,并尝试支持自定义地图。[EN] Provides extensive configuration for Wathe to create a relaxed, customizable experience. Supports fully custom maps beyond train tweaks.
Mona's Brews
Mona's Brews is a Vanilla+ data pack seeks to add in numerous custom beverages. They all have unique effects and utilities, and some can even get you drunk.