JEI Biome Feature Overview

JEI Biome is a JEI information addon that collects biome generation data from datapacks and displays it in JEI pages.

It helps players check which mobs, mob drops, blocks, ores, and terrain-related features can appear in each biome.

Core Features

Biome Mobs JEI Page

Displays mobs that can naturally spawn in the current biome, grouped by mob category:

Ambient mobs
Monsters
Creatures
Underground water creatures
Water creatures
And more

Mob Tooltips With Spawn Information

When hovering over a mob spawn egg, the tooltip shows:

Mob category
Spawn weight
Spawn count per attempt
Spawn position, such as on ground, in water, or in lava
Spawn search position, such as surface, ocean floor, or walkable surface

Note: actual spawning may still be affected by the mob’s own rules, such as light level, blocks, space, and other conditions.

Drop Source Hint

When entering a biome mob page through a mob drop, the top of the page will display:

“Rotten Flesh comes from the following mobs”

The next line will show the corresponding mob spawn eggs, followed by the normal mob list for that biome.

Biome Blocks JEI Page

Displays block information related to each biome, including:

Biome terrain / surface candidate blocks
Surface feature blocks
Underground feature blocks
Ore blocks

Ore Tooltips With Distribution Information

When hovering over an ore block, the tooltip shows player-friendly ore generation information, such as:

Source: common vein, large vein, buried vein, or extra vein
Vein size
Attempts per chunk
Height range
Distribution tendency, such as “more common in the middle of the range, rarer near both ends”

Block Blacklist Tag Support

Blocks can be hidden from the JEI biome block pages by adding them to this block tag:

jei_biome:biome_block_blacklist

How to Use

Run /jei_biome export to collect biome information and store it in the config file.

After that, the data can be queried without running the command again.

Modpack authors can also distribute the generated config file so players can use the information directly.

After running /jei_biome export for the first time, you need to exit and re-enter the world before the JEI pages can display the collected information.