Data Dumper
Mod Overview
The Data Dumper mod provides a powerful toolkit for extracting data from Minecraft game registries using regular expressions and tags. The obtained information can be used in datapack development.
Main Features
The mod allows exporting JSON data that couldn't be processed by standard game tools. This is especially useful for debugging when combined with other development mods.
For convenience, it's recommended to use the Mod Sets mod, which allows disabling development tools in final builds.
Visual Examples

Wooden planks output example:
minecraft:oak_planksminecraft:spruce_planks
minecraft:birch_planks
minecraft:jungle_planks
minecraft:acacia_planks
minecraft:cherry_planks
minecraft:dark_oak_planks
minecraft:mangrove_planks
minecraft:bamboo_planks
minecraft:crimson_planks
minecraft:warped_planks

Chests output example:
minecraft:chestminecraft:ender_chest
minecraft:trapped_chest
Commands
/datadumper registries- Exports all registry keys/datadumper registry <registry_key> [tag/regex]- Extracts keys from specified registry/datadumper entry <registry_key> [tag/regex]- Exports data JSON files