Data Packs for Minecraft Java
Browse 15,980 free data packs for Minecraft Java — popular picks include Simple Trim Effects, KyuBeacons, Balloon PVP.
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Simple Trim Effects
This data pack gives the player simple status effects when wearing a full set of any armor trimmed with any smithing template.
KyuBeacons
Adds "beacons" which can apply Custom Effects onto nearby Players, such as give them Blindness or force them into Adventure Mode.
Balloon PVP
When you have a balloon, you are granted the powers of creative mode. But if it touches the ground? You die...

No Nether Water Bucket
When going to the nether, any water bucket within your immidiate inventory will evaporate.
Disable Shield
Shield no longer blocks
Gamble Drops
Gamble drops is a Datapack where ever block drop or mob drop is rolled by (0 to 4) and you either get nothing or more than usual drops
Origins: Midnight Alchemist
Adds the Midnight Alchemist origin!
The Complete Advancement Drop Randomizer, Shuffler & Multiplier
Advancement-based multiplier, randomised drops, and automatic reshuffling - the most complete advancement pack in the series.
Cataclysm Bosses in Dungeon Realm by Karl Karlmann
Simple Datapack that places Cataclysm Bosses and Mobs inside Dungeon Realms
Sooqwess's Greece Mythology
The power of Olympus in your hands: Mythical weapons, legendary artifacts, and the awakening of the Titan Kronos.

Totem Run
Totem run is a mini game where there is a runner and 1 or more hunters. The runner gets a totem every 4 seconds, with their goal being filling their entire inventory with totems. The runners have full diamond and are trying to kill the runner.

Campfires Need Fuel!
Makes it so you need to fuel campfires to keep them alight.
Mace enchantments coexist
Allows Breach and Density enchantments to coexist on a mace.
RPGish-HPDisplay-DataPack
RPG-Style HP and Damage Display Data Pack
Unexplored Seasons
Adds a season requirement for the growth of saplings and fruits from the Regions Unexplored mod.

Craft ExpBottle
Crafting expbottles

Switchy Origins Forge
Quick and dirty datapack to add Origins Forge compatibility to Switchy 3.
Let's Do 'til Midnight
Added what I believe are appropriate comfort tags to a majority of the "Let's Do!" mod catalogue.
A Couple More Midnight Thoughts
Added what I believe are appropriate comfort tags to a couple blocks that I think were passed over from vanilla Minecraft but I felt made sense.
Diamond Upgrades
This datapack lets you upgrade your iron tools and armor into diamond tools and armor using a flower and a smithing table!
enderpearlrandomtp
Required data package for the server plugin
DunoLoons Panda
Adds a Panda-themed Hot Air Balloon to Bamboo Jungle biomes, complete with its own custom loot. Fully tested for 1.21.9 to 1.21.10 — a small touch that makes Minecraft’s empty skies feel alive again.
Enchanted Golden Apple Addition Reborn
Add recipes, advancements,... for enchanted golden apples.But it is 1.21.10 version(DatePack)
cborder
A simple datapack that adds a circular border
coal
a modification that allows you to convert crushed coal into coal create:the factory must grow there is a mod, create: the factory must grow, and this data pack can help (it is not intended but is useful in almost all situations with it) with the creation
Die Or Lose
A challenge datapack where you need to die every 60s to survive...
Nikki's Music and chantments
a enchantment addon with a couple of custom music discs
Axeable Lacugrove Bookshelf
Make Lacugrove Bookshelf from the BetterEnd mod Axeable (as it should be)!
Soluners Currency Datapack
A datapack that adds tradable currency to minecraft using Items
Frost Walker Tweaker
This DataPack lets you use Frost Walker II while riding an entity.
Addon for Keep Some Inventory - Aquaculture
Add support for Aquaculture to Keep Some Inventory.
Master Crafting
This datapack unlock uncraftable items in the game and add some old recepies like enchanted golden apple
Oreo Cat Pack
RESOURCE PACK IT SAYS DATAPACK SINCE I CANT FIND RESOURCE PACK TAG "Made this for my sister's birthday (April 14) because she wanted every Minecraft cat to be Oreo... so now every cat is Siamese whether you like it or not.
Epic Spawn Eggs
A datapack that changes the rarity of all Spawn Eggs to be Epic.
PovertySMP Datapack
Datapack for PovertySMP
No Strongholds
This is a datapack which remove StrongHolds for 1.21.1