Fabric Mods for Minecraft 1.21
Browse 6,633 free Fabric mods for Minecraft 1.21 — popular picks include Renamium, Vanilla Thirst Bar, CustomModelData Changer.
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Renamium
Renamium is a mod for Minecraft based on the Fabric API for viewing item renames and entity renames in resource packs.
Vanilla Thirst Bar
You can drink from a water source, cauldron or with vanilla items. Items have food/drink info on tooltip. You can see your food/thirst saturation on ur HUD with an Appleskin-like hud. Solo and multiplayer.
CustomModelData Changer
A Fabric Mod that lets you change the CustomModelData of items
Fix Jungle Saplings
Fixes Jungle Saplings drop rates to match other trees.
Zenith Client
A utility mod, specialized for PVP
Auto Map Update
Auto Map Update is a mod to make your map have all the new building you built after creating a map
Improved Map Colors
Small project aimed at improving the customizability of Minecraft maps through datapacks, made for Gneiss Name's video
Verdant Growth
A spreading plant growth threatens to overtake and convert all matter in its path. Either fight it or join it!
Control Saver Mod
Saves your options so you dont need to change your controls everytime you change version or play with a modded client.

aicheye's Combat Tagging
Lightweight fabric server plugin to make PvP fairer and prevent combat-logging.
ImmortalCats
Make cats immortal.

Piston Sound Mod
Brings back the old 16 block range of piston sounds.

Longer Strength II Potions
Changes level 2 strength potions to last 8 minutes instead of 1.5 minutes
Near Player
Displays distance to nearby players with equipment icons and direction arrows.
Vanilla Combat Improvements
Adds 6 new weapons with custom abilities and effects that refresh vanilla combat.

Collateral
A simple vein mining mod
Frost's Mace Calculator
Mace height damage calculator for Mace PvP
Xicz Gap Releaser
This mod Automatically releases golden apples at the perfect tick to guarantee early consumption timing. This is not the same as Consumable Optimizer.
Good Luck!
Good Luck gives purpose to the luck mechanic by making loot tables more influenced by luck and by making the Potion of Luck accessible.

Trickster Math Tricks
Adds more math tricks and fragments into Trickster
Open Please
Auto-opens doors, trapdoors, and fence gates without the use of a pressure plate and closes them behind you!
player tick freezer
freezes survival players too when you do /tick freeze, not creative or spectators
Shinra Tensei!
Become Pain from Naruto and farm aura. This mod is updated as a part of my video series on Youtube where I code it into reality (in Turkish).
BetterPrisons
A client side mod for usage on CosmicPrisons intended to replace CosmicClient.
AntiHit
A mod that adds a friend system.
Just Drop It!
reworks the vanilla item drop physics, so they become more natural and visually better. enhancing your gameplay!
Retro Minecraft Visuals
A simple visual mod that contains various features to make your game look more like Old Minecraft! Renders fluids as blocky, as they were in Infdev. Aims to bring some nostalgic features to modern Minecraft!
DurabilityLess
DurabilityLess Removes Durability!

Tiny Terrors
Adds baby (and jockey) versions of creepers, endermen, skeletons, stray, bogged and wither skeletons
Better Concrete Conversion
Converts concrete powder to concrete when it touches water in item form. Eliminates the need to place every concrete powder block you want to convert
SixSeven
Who decided stacks should stop at 64? SixSeven bumps it to 67...cause... you know....

Elytra Aeronautics Port
Elytra aeronautics ported to higher versions
ZenXArch's Skyblock
An expanded skyblock challenge
Drop Keybinds
Simple client side mod that adds more keybinds for dropping items!
Consistent Shift
Makes Shift+Click behavior consistent: items from any container are moved left to right, just like in the player's inventory.
The Copper Beacon
Adds the ability to make and activate beacons from all copper variants, and also added an updated gui for the beacon!