Data Packs for Minecraft Java
Browse 1,569 free data packs for Minecraft Java — popular picks include Heal Happy Ghast, Wool makes string, Ability Carpets for Llamas.
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Heal Happy Ghast
A datapack/mod that heals Happy Ghasts by 2 hearts when you throw a snowball at them.

Wool makes string
Adds the ability to craft wool and carpet into string.
Ability Carpets for Llamas
Adds 15 custom ability carpets, which give llamas wearing them custom abilities, making this almost useless mob useful again.
Craft Spawners and selected Monster Eggs
Vanilla+ crafting recipes utilising mob heads.
Truly Random Mob Drops
Any mob may drop any item, truly.
Useful Name Tags
Adds multiple uses for name tags!
Ridicule
Random items added to minecraft
Tameable Wither DataPack
This Data Pack Lets You Tame Withers
Biome Vote
Meerkats and oases in the desert.
Shattered Kingdom
Custom structures, legendary weapons, powerful armor trim powers and weapon bindings that give any item overpowered attacks and benefits
Better Warden
Configurable Shrieker Behavior | This data pack aims to fix the issue of Shriekers being almost completely useless after being picked up by the player while allowing for a balanced and customizable experience.
lavs Renewable Echo Shards
This datapack makes the warden drop Echo Shards when killed by a player, making these renewable, as long as you can kill the warden.
Chaos Minecraft
Making Minecrat chaotics. That's it.

greenishlemon's XP Hearts
Gives you 1 extra heart for every 5 XP levels.
Wither Fortress│凋零堡壘
Now the Wither has its own home — the Wither Fortress, and you can no longer outmaneuver it.│現在凋靈有了自己的家──凋靈堡壘,你再也無法巧勝它。
Random Mobs spawn every 20 seconds
Every 20 seconds, a random mob spawns right on you. Pure chaos. Pure fun.

The Claw Datapack
Extend the range you can place/brake blocks with a new tool! Inspired by the Crab Claw, introduced my Mojang in the 2023 Mob Vote.
Disable aggressive animals for Overly-Realistic
An addon for Overly-Realistic to automatically disable aggressive animals
PermaEfe Extreme Survival
PermaEfe is a Minecraft datapack that increases the difficulty progressively for 30 days, with mechanics such as permanent death, boosted mobs and unique craftables. Ideal to play with friends and test your survival.
Harmless Slimes
This datapack/mod makes slimes do no damage
Happy Ghast but Fast (9x Speed)
This makes the happy ghast faster using Minecraft attributes

Upgrades for Sheep
Craft unique upgrade modules for sheep, which unlock new abilities for them.
Adaptive World
Adaptive World is a datapack/mod that makes the game harder the more you stay in one area
Villagers on Strike
Disables villager trading while keeping other village mechanics
Cat Amulets
Adds an amulet which you can give to cats, which will give you an extra heart for every cat with an amulet around you, and also more amulets to extend the powers
Craftable Mob Heads
A datapack that allows you to craft mob heads
Turn Into Baby
A simple datapack that lets you turn eligible mobs into babies.
[Cobblemon 1.7] Aeos Dunkers Skin Collection
Adds Orange Unite Style and Purple Unite Style holowears from Pokemon UNITE, for several Pokemon.

Death Collection
Are You Ready to Collect all the death ! Good Luck !
Frogslime
Small whimsical improvements of frogs to make them more fun!
Mighty Steeds
Horses are under-appreciated by Mojang, lets give them some love!
Strengthening Golems│強化傀儡
You can repair snow golems using snowballs, just like you can repair iron golems.│你可以用雪球修復雪傀儡,就像修復鐵傀儡一樣。
Randomized Villager Names
A data pack that gives random names and titles to all villagers you trade with totaling over 3000 combinations.
Happy Ghast but Fast (8x Speed)
This makes the happy ghast faster using Minecraft attributes
Caveat
Expanded entity behavior
Mob Drop Recipes
Adds recipes for bones and gunpowder for worlds which have mob spawning disabled.