Data Packs for Minecraft Java
Browse 6,895 free data packs for Minecraft Java — popular picks include Custom Boss Template, AtomicsLib, HardcoreSpectator.
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Custom Boss Template
Easy custom boss template for Minecraft 1.21+. Fully configurable health, name, appearance, phases, attacks, messages and rewards. Perfect for adventure maps and servers.
AtomicsLib
This is a library datapack which adds all the annoying things you end up making everytime.
HardcoreSpectator
It’s a mod that automatically puts the player into Spectator mode upon death, just like in Hardcore. It’s compatible with GeyserMC because it only changes the server-side gamemode without requiring complex client-side mechanics.
din's REMOVE DIAMOND
Makes diamond ore generation ZERO, removed ore diamond blocks, only obtainable through villager trades, adding more challenge and excitement to mining in Minecraft Java Edition.
Ghast Gauntlet: Dogfights
A minigame datapack for happy-ghast based sky battles.
BounceBack
TP You at 200 blocks if you take a damage
Comment Command Block
Commad Block Hover Note in Java Edition
Zombie Horse Traps
Adds Zombie Horse Traps into Minecraft!
cheaper_chunkloader
Makes loadstones cheap (one oak button) and you put a dirt block on top of the loadstone to make it the chunk constantly load
Weighed Down
This data pack adds weight to the player depending on how many items the player has in their inventory.
Prismatic Wings
Prismatic Wings adds two smithing table recipes which upgrade an elytra, which can propel themselves without fireworks.

MeilleurCraft
BetterCraft is a DataPack that improves and rebalances several crafting recipes in the game to make them more logical, useful, and accessible, while remaining balanced for an enhanced vanilla survival experience.

Potion Dipping
Apply your potion effects to your weapons!
Percy's Dummy Item
Customise your custom items even further. A project for SMP's, role-players, and resourcepack makers. (Realms Compatible)
Notch Apple Recipe Restored
This Datapack adds the Ability to craft Enchanted Golden Apples in Survival Minecraft using 8 Blocks of Gold and 1 Apple.

nametagcrafts
This datapack adds the ability to craft nametags for 1.21.x.
Player Gifts
Player Gifts is a lightweight datapack that allows players to send items to each other using simple trigger commands.
Enchancement Durability Pack
Reimplements durability for the Enchancement mod.
living water
Now you take damage when you're not in water
Warden Boss Bar
A datapack that adds a boss bar for the Warden and a new advancement for killing it.
Furnaces Revival
Adds new furnaces that introduce new mechanics to minecraft! The project is WIP

Simple Saddle Recipe
One of many saddle recipes out there... Simple, with two iron ingots and three leather.
Origins: Doohickey
A Datapack that adds the Doohickey origin
Wooden Tools to Charcoal
Wooden Tools to Charcoal is a datapack for any version technically but I recommend 1.20+!
Craftable Gunpowder 26.2
Adds the ability to craft gun powder with sulfur blocks and charcoal
Bundled Findings
Some hostile mobs can now rarely drop a bundle with randomised loot inside!
Chaotic Sulfur
Craft gunpowder and unstable TNT with this "Chaos Cubed" Overhaul datapack.
F*** baby zombies
Makes baby zombies exactly 1.001 block tall, severely nerfing them by preventing them from going through 1 block gaps.
Take The Job!
TTJ forces villagers named "ttj" to take workstations next to them or lose their job if there are none.
Sword Blocking Revived
A datapack that allows you to block with the sword
Complicated - data pack
Mid-Tier Challenge Pack that aims to Rework Minecraft's Progression, Entirely! Using recipes and custom items involved. Which includes furnaces, stonecutter, Smithing table and etc which are needed to the lengthier progress.
[ Craftable Wheat Seeds 1.3.1] Craft The_Uncraftable
This Minecraft Java Edition Data Pack adds recipes to uncraftable items.
Wyld Life's Wyldcards
These are the Wyldcards from Wyld Life
Useable Multishot
Makes Multishot and other arrow-based enchants useable!

Speedrunnersbane
Making Minecraft more annoying for everyone. But mostly speedrunners.
Down With Magic
Down with enchantments! Down with potions! Boycott magic!