SeedMapper

This Minecraft mod for the Fabric platform provides players with advanced capabilities for working with world seeds. To fully utilize all features, you need to know your world's seed. If the seed is unknown, it can be determined using third-party tools.

Main Features

Seed Map

Command: /sm:seedmap

Opens an interactive world map based on the specified seed. The map can be moved with the mouse and zoomed with the scroll wheel. Toggles for displaying various features are available at the top of the screen. Especially useful when combined with the /sm:source command!

Biome Locating

Command: /sm:locate biome <biome>

Finds the specified biome closest to the player. All biomes in all dimensions are supported.

Structure Locating

Command: /sm:locate feature <structure>[<pieces>]{<variants>}

Determines the location of the structure closest to the player. All structures in all dimensions are supported. For advanced searching, you can use data about structure parts and variants. For example: /sm:locate feature structure end_city[end_ship] to search for end cities with ships.

Ore Vein Locating

Command: /sm:locate orevein (copper|iron)

Finds the nearest copper or iron ore vein. Returns the coordinates of the first ore block in the vein.

Loot Locating

Command: /sm:locate loot <amount> <item> [<enchantment conditions>]

Searches for chests with loot matching the specified items and enchantment conditions. All versions from 1.13 onwards are supported.

Block Highlighting

Command: /sm:highlight block <block> [chunks]

Highlights specified blocks in the world. The location of coal, copper, and emerald ores may be inaccurate due to generation features.

Ore Vein Highlighting

Command: /sm:highlight orevein [chunks]

Highlights ore veins in the world, distinguishing main ore blocks.

Slime Chunk Locating

Command: /sm:locate slimechunk

Determines the nearest slime chunk with absolute accuracy.

Source Mutation

Command: /sm:source (run)|(as <entity>)|(positioned <position>)|(rotated <rotation>)|(in <dimension>)|(versioned <version>)|(seeded <seed>)

Executes commands from a modified source, for example, from a different position or as a different entity.

Installation Requirements

Java 23 is required for the mod to work. It is recommended to install Java 23 and configure the Minecraft launcher to use this version.

• Vanilla launcher: Installations → Edit → More options → Java executable
• MultiMC: Edit Instance → Settings → Java → Java Installation
• PrismLauncher: Settings → Java → Java Runtime → Auto-Detect...

Before using commands, you need to configure the seed using /sm:config Seed set <seed>.