Minecraft Java 1.21 Mods
Browse 325 free mods for Minecraft Java 1.21 — popular picks include There's Always a Bigger Fish, Basin Generation Fix, Archaeological_Research:Exploration.
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There's Always a Bigger Fish
A rework of fishing mechanics, adding new biome-specific fish to catch and a bait system!
Basin Generation Fix
Basins are a rare, small terrain features that strip away the top layer of a biome's surface, leaving a stony floor. Due to a bug they stopped generating in 1.18. This mod/datapack adds them back
Archaeological_Research:Exploration
Archaeological research is an adventure mod that studies civilization and nature.
Nasir's Mobs Plus
Adds more mobs based on the biome! and maybe some more evil ones...
Yet Another Gravestone Mod [YAGM]
Seals your items and XP in a gravestone when you die, with biome-themed graves, naturally forming cemeteries, and tameable Ghost companions.
Massively More Starters [Cobblemon]
Adds a TON more starters to the starter screen. Neutral natures and 3 perfect IVs too.
[Cobblemon] Jet's Biome Besties
A Cobblemon Addon that is dedicated to adding cosmetic variants for pokemon dependant to specific biomes/climates!
Settling Trader
Converts wandering traders into villagers as a way to populate new villages with different biome variants
Biome Resonance Enchanting
Enchanting table enchants match the surrounding biome, granting unique enchantment bonuses and exclusive enchantments based on where they are placed.
Better Birch Forest
Better Birch Forest adds new vegetation and more Saturatet colors to the Birch Forest. Also it adds Fireflys

More Tools N' Stuff
MTNS adds in brand new biomes, blocks, items and more into Minecraft!
Level Z - Oh The Biomes We've Gone
A level Z add-on for the Oh the Biomes We've Gone mod
Outer End Wilds
Adds Two New End Biomes inspired by Minecraft Dungeons
Biome Shader Switch
🗸 Switches shaders based on the player's current biome. Supports Iris & Oculus shader packs with per-biome, per-height, and fallback shader rules. Auto-detects all biomes including modded ones — zero manual config needed.
Cobblemon SnomFix (AllTheMons)
Datapack that fixes a couple Cobblemon spawn biome configs.
Sulfur Depths
This mod adds a new biome boiling caves and a new mob - sulfur slime with unique mechanics and items to the game
Enhanced Biomes Music
Improves soundtrack playback in biomes, adds an Intelligent Playback System in Mountain and Cave biomes — something that was so missing in Minecraft. Check out the description to see what else the mod improves.
BioMech
Man and machine become one. Replace body parts with machine parts and enhance your own body with new functionality.
consistent jungle leaves
makes the jungle leaf loot table the same as another leaves
Radiach
This hardcore mod adds radiation to all biomes. From the very beginning the player will be accompanied by radiation
Sanding Rose Quartz - Biomes O' Plenty
Allows you to sand your rose quartz from Biomes O' Plenty into polished rose quartz from Create.
Realistic Plant Growth
Powerful Spigot/Paper plugin that brings a new level of realism to the Minecraft flora, allowing you to fine-tune growth parameters on a per-biome basis.
Big Globe - Biome Tags
Adds Big Globe's biomes to vanilla and Tough As Nails biome tags
BiomeCuisine
Food items provide different hunger and saturation values depending on which biome you consume them in.
Green Cuts
No more deforestation on SMP!
Biome Replacer (Neoforge)
A quick way to get rid of a biome. Useful for tweaking datapack-based generators (like Terralith) that don't have a convenient configuration
Structure nature(Alpha)
we add everything we think is fun anything that will enhance the minecraft experience
[World Generator] Winter Apocalypse++
Makes the world cold and snowy in every biome in the overworld.

Breath.
This datapack adds steam from the mouth in cold biomes & bubbles underwater.
Mildly Fast Leaf Decay
Mildly Fast Leaf Decay accelerates the natural leaf decay process to clear forests quickly while maintaining a satisfying cascading visual effect. It is optimized for Fabric to help reduce server lag and keep your world clean without feeling instant
Global Emeralds
Unlocks Emerald Ore to spawn in all biomes.
Rhyme PVZ
This is an impressive PVZ module which will include most of the plants and zombies from PVZ 1 and PVZ 2, with new mechanics and gameplay.
Klsts' Monsters
Adds some monsters and mechanics to increase difficulty
Forever Winter
Makes all biomes on the overworld snowy.
More Little Decorations
Adds details in the form of different stones from different materials to each biome. In the future I plan to add more details such as sticks flowers fallen leaves and the like.
B-RTP
BlanketRTP is a Minecraft Fabric mod that offers customizable rtp (random teleportation), including biome-specific options. Enhance exploration with a gliding mechanic after the (RTP). Easy to configure and optimized for performance