Fabric Mods for Minecraft 1.21
Browse 25,259 free Fabric mods for Minecraft 1.21 — popular picks include Minemon -- A cobbleverse spinoff, keys and coins, Custom Item Durability Bar (CIDB).
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Minemon -- A cobbleverse spinoff
A private custom version of Cobblemon

keys and coins
Keys and Coins is a cosmetic and utility add-on designed to enhance your world’s visual appeal and economy systems. This mod introduces a variety of detailed 3D-styled keys and a complete set of multi-tier coins.

Custom Item Durability Bar (CIDB)
Change colors of item durability bar to what you like!

Healthy Habits
A personal wellness tool to encourage healthy habits by adding positive affirmations, wellness reminders, and wellness breaks to your game. Positive Affirmations can be customized through config files.

Simple Functions
This makes a rewrite of the /function command(/call) to make the procces of calling a function with arguments more user friendly
Mellend Optimization
The project is focused on developing an optimized Minecraft build with an emphasis on performance, stability, visual appeal, and maximum compatibility with each version.

Portal Hitbox Fix
reverts the v1.21.5 Nether Portal hitbox to a full block

Huh?
Make a 'Huh' sound when you are confused.

Lucas' Flight Hud
A simple hud for the elytra
Enhanced Efficiency
A modpack that aims to drastically improve the game's performance and adds a ton quality of life features for the best Minecraft experience.

PokeHighlight (Cobblemon)
Cobblemon side-mod that adds recurring spawn events inspired by the Community Day format in Pokémon GO. During an event window, featured Pokémon(s) spawn at a (configurable) increased rate, and have (configurable) boosted shiny odds.

Cyan Rose UpPort
Bring back the cyan rose! it was exclusive to the original Minecraft: Pocket Edition and other older legacy console versions.

Boe's Earth
Blockstates extension for shaders and resourcepacks
Better Servers
A 100% server side modpack that is on fabric 1.21.1 for the best performance and lets you play with your bedrock friend without making a bedrock server
TurtleFPS - Boost your FPS!
[1.21 Version] A simple modpack to enhance your experience, improve performance and have fun with your friends!
Сборка для сервера PRISMA
The essential client-side modpack for the PRISMA server. Includes major performance optimizations, Plasmo Voice, and Emotecraft for a smooth and immersive multiplayer experience.

Don't Minimize on Focus Loss
A Mod to make Minecraft not minimize its fullscreen window when focus is lost

Meme Music Pack
Changes the music discs of Minecraft to funny goofy music.

Borukva Inventory Backup
This server mod create backup mechanic for players inventory. Support MySQL or file H2.
DucksOnIce
Just a small, cozy Minecraft Winter Modpack. Join a world covered in snow. Build yourself a warm winter cabin and decorate it using items from a variety of mods. Perfect for creating a cozy winter atmosphere in Minecraft!

Polybook
Server-side book item for Polydex (Polymer mod)

Wooden Horse Armor
This mod adds horse armors made of wood!

Backup Scripts
Execute your scripts at builtin save system events.
Sengoku EMI/JEI integration
EMI/JEI integration for Sengoku Jidai
Cobblemon Hunter (Pokemon Modpack)
Pokemon Cobblemon Pack - Performance mods!

AngleTracker
AngleTracker is a mod that helps players precisely track and save their viewing angles (yaw and pitch), making navigation and building in Minecraft easier!
Your Local Floridians' Better Multiplayer
Your Local Floridians’ Better Multiplayer aims to make a lightweight, immersive vanilla+ experience which is fun for a group.
Nitroserver
Lightweight serverside optimizations for Fabric 1.20.1, 1.20.6 and 1.21
[FMCS-L] fps X media X crystal x survival Optimized LITE
A lightweight optimization modpack designed to boost FPS and improve performance.

ai chat mod
make ai chat in Minecraft. May be ai will be slow, but it still good.

Time Formatter
A client-side mod which formats Discord Timestamps to your local time.
Nexus
Insane performance, quality of life mods and other improvements to make Minecraft even better, without making your Worlds function less like Vanilla

ChatFilterV1
A client-side chat filter for Minecraft. Block any words or phrases with /chatfilter add/remove/list

WoolProofed
A Minecraft Fabric mod that blocks sounds when wool is placed between the sound source and the player. Perfect for creating soundproof rooms or reducing noise pollution in your builds!
thesomewhatyou's Old School Computer Revival project
A project that will help revive old PCs that have integrated graphics for optimal Minecraft gameplay. This will include an arrange of optimization mods that are compatible and whatnot.

Dirtmonds
Adds dirtmonds to the game