Data Packs for Minecraft Java
Browse 1,343 free data packs for Minecraft Java — popular picks include Elytra Lunge, GAMBLING COBBLEMON, Nightmare Mode.
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Elytra Lunge
Allows the "Lunge" enchantment to work while gliding with an elytra
GAMBLING COBBLEMON
Cobblemon always lacked something, and now it's perfect. GAMBLEEE. (If you put a relic coin in fossil revival thing it gives a random pokemon lol)
Nightmare Mode
A datapack that expands on Minecraft's hard difficulty to make the game exponentially more difficult!
Classic Mechanics
Adds a variety of configurable features from older minecraft versions!

No Lunge Cooldown
Removes cooldown from spears having lunge enchantment
1 Hit
Allows creative players to kill mobs with one hit.
Ocean Only
Only oceans will be generated in the overworld.
0,5 HP
If you fall from any height, you will have at least half your health left.
PlayerProgress
PlayerProgress is a Minecraft datapack that introduces a leveling system. Earn UP from activities like mining and combat to level up and gain new abilities and rewards.
Magic Items
Craft and Use powerful items!

oSzoukaua's: Bee Small
A Datapack/mod that can make Bees smaller! (or set a custom default scale!)
Minecraft Chaos Datapack
Inspired by the GTA Chaos Mod. There are 190 different effects possible in this challenge datapack!
World Loading Tweaker
Allows you to change the spawn chunk radius of Minecraft, either speeding up loading or improving spawn quality
Timo
This Data Pack/mod adds many new recipes, advancements and structures. This Data Pack/Mod improves many Loot Tables.

Tasty Supplies
Adds +90 new food items and 2 new weapons/tools to Minecraft!
Adult Zombies Only
Replace all baby zombies and similar with adults! Toggleable
Vaults of Abandon
Conquer the Vault, in the Vaults of Abandon - Dungeon Datapack. Battle Epic Bosses, Explore vast dungeons, and utilize powerful magic. Access over 50+ Custom Items, and battle over 20+ Custom Mobs.
Overworldify
Datapack that creates Nether and End dimensions that use the default overworld terrain.
Vivecraft Boots & Claws Disabler
A lightweight Datapack that disables both the Climb Claws and Jump Boots recipes
Purgatory
An asymmetrical horror minigame, that revolves around a place called purgatory, and justice for those who died unjustly
No Sky Limits
A very simple datapack that changes the vertical build limit in the overworld to 1024, both up and down.
Bedrock Bone Meal
Recreates some Bedrock Bone Meal functionality for players and dispensers.
Cobblemon: Sculked Mons
Added Sculk-infested Pokémon forms
Terrainless World Generation
Datapack that creates worlds with missing terrain.
Half Heart Hardcore
Half Heart Hardcore (or 1HP Challenge, alternatively) is a multiplayer challenge datapack, aimed at making the game almost impossible.
Every Block Drop Is Random
A full randomizer datapack where every block drops a random item. Works across all versions — check downloads or changelogs for the exact pack_format you need.
LQHP: Low-Quality Horror Project
Add some unnecessary spook to your world!
The Infinite Village
A simple data pack that turns the whole Overworld into one big village.
No F3/Debug Screen
Removes the debug screen, server side
Martini´s Better Enchantment Compatibility
This Mod/Datapack makes changes the way you enchant your Items. It lets you combine enchantments that are normally not compatible.
Better, Faster Happy Ghasts
Configurable speeds for the Happy Ghast, perfect for survival servers!
Player Head Drop
Let the players get the heads of other players!
Diabolical Islands
Datapack that creates Nethers with the same floating island generation of Aetherial Islands.
Meteors
Meteors falls from the sky!
Enchanted Golden Apple Recipe
Now craft your enchanted golden apple

Origins: The Worm
It may not be big, it may not be strong, it may not be brave, it may not be- This adds the "Worm" to the game. It has a collection of interesting abilities / quirks that are... worm-y??