Add data packs to your server

Data packs are vanilla’s own way to change recipes, advancements, loot tables, world generation and functions. They work on every Minecraft Java server, plugin or modded, no client install needed.

Install from the panel

Resources, Data Packs.
Search Modrinth and press Install. The pack lands in world/datapacks.
In the Console: reload, or restart the server. Packs that change world generation only apply to new chunks.

Install by hand

Files, open world/datapacks.
Upload files with the pack’s zip. Leave it zipped; a folder works too if it contains pack.mcmeta at the top.
reload in the console.

Check it loaded

datapack list
datapack enable "file/mypack.zip"
datapack disable "file/mypack.zip"

Good to know

Data packs are per world. A reset world starts with the vanilla defaults; keep your zips in the panel’s Installed view to reinstall in a click.
A pack made for one Minecraft version usually breaks on another; the pack’s page lists what it supports.
Worldgen packs (custom biomes, terrain) must be in place before the world is created or the chunks will not match.