RemapIDs

Remap any item, block, fluid, or entity ID to another — data-driven, zero-config code.

RemapIDs is a utility mod for modpack developers that lets you redirect registry IDs throughout the entire game using simple JSON files. Unify duplicate ores across mods, replace deprecated items, or migrate worlds between mod versions — all without writing a single line of code.

Features

Registry Remapping Remap across 7 registry types:

Blocks, Items, Fluids, Entity Types
Tags, Recipes, Loot Tables

Remaps are applied deeply — recipes, loot tables, tags, NBT data in inventories and containers are all automatically rewritten.

Data-Driven Configuration Drop JSON files into config/remapids/remaps/ and you're done:

{ "remaps": [ { "source": "iceandfire:silver_ingot", "target": "othermod:silver_ingot", "types": ["item", "recipe", "loot_table"] } ] }

Wildcard Patterns Bulk-remap entire families of items with a single rule:

{ "source": "iceandfire:silver_*", "target": "othermod:silver_*" }

Tag-to-Item Recipe Conversion Replace tag ingredients in recipes with specific items:

{ "source": "#forge:ingots/silver", "target": "othermod:silver_ingot", "types": ["recipe"] }

Smart Chain Resolution If A remaps to B and B remaps to C, the mod automatically flattens this to A→C. Circular dependencies are detected and rejected.

Live Reloading Tag, recipe, and loot table remaps are reapplied on /reload — no restart needed.

Zero Runtime Overhead Block, item, fluid, and entity remaps are applied as registry aliases at startup. After that, there's no performance cost.

Supported Versions

Minecraft Loader 1.20.1 Forge 1.20.1 Fabric 1.21.1 NeoForge 1.21.1 Fabric

Use Cases

Ore unification — Redirect all silver ingots from 5 different mods to one canonical ID
Mod migration — Swap out a removed mod's items for replacements without breaking existing worlds
Loot/recipe cleanup — Rewrite loot tables and recipes to use the items you want
World upgrades — Items already in inventories and containers are remapped via NBT on load