Fabric Mods for Minecraft 1.21
Browse 1,019 free Fabric mods for Minecraft 1.21 — popular picks include Primal Winter, Profundis: Nine New Quality Cave Biomes, BiomeInfo (Fabric).
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Primal Winter
The entire world has been converted into a frozen wasteland with heavy never ending snowstorms.

Profundis: Nine New Quality Cave Biomes
A world generation mod adding in nine new cave biomes, to make the underground more varied.
BiomeInfo (Fabric)
Adds a configurable text to the top left corner (by default) saying what biome the player is in.
Pillager Caravans
Adds roaming pillager caravans with biome-themed loot and guarded convoys!
Farmer's Cutting: Regions Unexplored
Adds Farmer's Delight cutting recipes for Regions Unexplored
TravelerZ
Adds titles while traveling through biomes to show the average level of mobs as an addon for the nameplate mod
Villager API
An API to add custom villager professions and villager biome types with custom trades without writing code.
Ember's Floating Islands
Floating Islands with dungeons, villager homes and more magical places to explore!
Ruined Lighthouse
Adds a broken lighthouse to beaches with hidden loot and a challenging parkour inside, rewarding players who make it to the top.
Winter Overhaul
A mod which overhauls snowy biomes :)
YANDO's NPC Variety
NPC Variety, because villagers deserve more.
Mob Compack
(a couple of) Mobs for Biomes O' Plenty
Desert Oasis
Adds an oasis to desert biomes
Stellarity
Extreme rehaul of The End in a unique fantasy style, combined with biome and structure overhauls, new items, weapons and plenty of other content to discover.
Epic Structures: Witch Huts
Makes Witch Huts beautiful!
Feur - Extension Jungle
[Vanilla+] Adds better structures to jungles with new trees, new temple or ruined villages
Myths of The Sea - Mythology Mobs!
Discover new mythological aquatic creatures, such as the Leviathan, the Kraken, the Hippocampus, and many more!
Ocean Lily Pad Village
Adds villages floating on giant lily pads to ocean biomes.
Illager War Trireme
Adds an Illager War Trireme to warm ocean biomes
Spooky Trees
Adds spooky trees to forest biomes
Scorch!
Additional content and rebalancing for the nether.
Cherry Grove Starter House
Adds a Cherry Grove Starter House to the game
Nature Arise
add new biomes, improve vanilla biomes and vanilla style additions
Snuffles (Fabric)
Adds Snuffles, a new mob to snowy biomes!
Forest Ruins
Adds ruins to the forests
Firefly Bush [1.18+1.21++ Backport]
Add fireflies in firefly bush
Serene Shrubbery Refabricated
Create lush gardens with new flowers and plants! Fabric Port!
Prehistoric Paintings - Dinosaurs, Landscapes...
Replaces the vanilla paintings with prehistoric paintings.
Nirvana
Nirvana is a mod that aims to add Hemp and Herb in a vanilla friendly way! Get ready to make some Herb Rolled in Paper, Oddly Shaped Glasses, Herbal Salves, Burlap and much more.
Reliable Replacer
A lightweight utility for replacing one block with another, both during worldgen and afterward.
Aquatic Creepers
New creepers that can appear in the oceans! Discover the new items and increase the difficulty of the ocean.
YUNG's Cave Biomes (Fabric)
Adds new vanilla+ cave biomes and underground content!
The Immersive Music Mod
147 new songs. Played based on biome and structure!
Cherry Hut
Adds a new Cherry Hut to the Cherry Grove Biome
Giant Brown Mushroom
Adds a giant Brown Mushroom to the Dark Forest and Mushroom Fields biome
Giant Swamp Tree
Adds a Giant Swamp Tree to Swamp Biomes.