Datapacks
Datapacks let you change how your Minecraft world behaves — custom recipes, loot tables, functions, predicates, and advancements — without running any extra code. They're data-only, so they work on any engine and are available to everyone.
- What a datapack can (and can't) do
- Which engines support them
- How to upload one, and why it persists automatically
What a datapack is
A datapack is a .zip of vanilla Minecraft data files. It can add or override functions,
recipes, loot tables, predicates, advancements, tags, and dimensions — the same building
blocks the game ships with. Because it's pure data and not executable code, there's no
sandboxing to worry about and nothing to gate.
| Datapacks change | Datapacks do not |
|---|---|
| Recipes, loot, functions, advancements | Run external code on the server |
| Generation and dimension data | Add new rendered blocks or textures (that's a resource pack) |
Game rules driven by /function packs | Require a specific loader |
Which engines support datapacks
All of them. Datapacks are part of vanilla Minecraft, so they work the same on a Paper, Fabric, or Forge world. They don't care which engine you chose at world-create.
Upload a datapack
- Open the world in Worlds.
- Upload your datapack
.zip. It's added to the world (world/datapacks). - Start (or restart) a room — Minecraft loads the pack on boot.
The per-file limit is 512 MiB, and uploads count against your account storage quota (an upload is rejected if it would push you over). Re-uploading a file with the same name replaces it, and you can remove a datapack anytime no room is running on the world.
Datapacks live inside the world, so they persist automatically — every snapshot carries them along, and they ride with the world when you import a save.
Persistence
Because the pack is stored in the world folder, you don't re-apply it on each boot the way you would a plugin or mod — it's simply part of the save. Snapshots back it up with the rest of your terrain and player data.
Lanzinha is not affiliated with Mojang or Microsoft. "Minecraft" is a trademark of Mojang Synergies AB.
→ Related: Minecraft servers · Resource packs · Worlds