Resource Pack Converter

Resource Pack Converter is an offline Java program that converts Minecraft Java Edition resource packs to another game version.

Author: @mib37104
Telegram: t.me/mib37104

This is NOT a texture pack and NOT an in-game Fabric/Forge mod.
It is a desktop tool. You run it on Windows with ConvertPack.bat, pick a pack, pick a target version, and get a new zip.

Requirements
- Java 17 or newer
- ConvertPack.bat + ResourcePackConverter.jar in the same folder
- Input: a .zip pack OR an unpacked folder that contains pack.mcmeta and assets

What it converts
- pack.mcmeta (pack_format, min_format / max_format on new versions)
- 1.13 flattening (textures/blocks -> block, items -> item, many texture names)
- GUI atlas slicing: icons, widgets, inventory, containers
- entity texture path remaps
- enchantment glint rename:
enchanted_item_glint.png -> enchanted_glint_item.png and enchanted_glint_entity.png
(needed from 1.19.4+)

How to use
1. Install Java 17+
2. Put ResourcePackConverter.jar, ConvertPack.bat and AUTHOR.txt in one folder
3. Run ConvertPack.bat
4. Paste the path to your pack zip or folder
5. Type the target version, for example 1.21.4
6. Press Enter on source version to auto-detect
7. The new zip appears next to the original pack

Limits
- Java Edition only, not Bedrock
- Does not rewrite OptiFine CIT/CEM
- Does not invent textures that do not exist in the original pack
- Models and brand-new GUI from later snapshots may still need manual work

Credit
Atlas coordinates follow public ResourcePackConverter / Mojang Slicer tables.

Questions and updates: t.me/mib37104