CurseForge · Minecraft mod
Item Codex
mod that adds a gui that mod makers can add item entries to via datapacks to tell players what items do and how you get them
Quick answer
Which Item Codex release matches 1.21.6 Forge?
Item Codex Booklet-Forge-1.21.6-1.0 targets 1.21.6 with Forge. The project page does not say whether this file belongs on the client, dedicated server, or both. No extra mods listed for this file.
Where it goes
Is Item Codex required on the client, server, or both?
The project page does not say whether this file belongs on the client, dedicated server, or both.
The source does not explicitly classify this release as client-only or server-only.
What else does Item Codex Booklet-Forge-1.21.6-1.0 need?
Booklet-Forge-1.21.6-1.0 on 1.21.6 Forge. Every mod below is checked against that same setup.
This file does not list any required mods. Do not add a library just because a different file uses it.
This file does not list any required or optional mods.
Before you install it
Add Item Codex without breaking your instance.
Built for Item Codex Booklet-Forge-1.21.6-1.0 on 1.21.6 Forge. Pick another file and the loader, install side or required mods may change.
- 01
Stick to this file
Use Booklet-Forge-1.21.6-1.0. It targets 1.21.6 with Forge; another release may have different loader, side or dependency requirements.
- 02
Bring the mods it needs
This file does not list any required mods. Do not add a library just because a different file uses it.
- 03
Put it on the correct side
The project page does not say whether this file belongs on the client, dedicated server, or both.
- 04
Pick the file you checked
Use the “Get this file” button beside Booklet-Forge-1.21.6-1.0. It opens that exact file at the source.
About this project
What does Item Codex add?
The Item Codex is a mod built for mod / modpack makers to show to players what items do and how they can be obtained without having to use third party apps!
To open the screen you can click the default keybind of "K" but this can be changed at any time in controls under the gameplay category
Some features you can showcase within the UI in the first update:
- Villager Professions
- Mobs with baby models
- Armor Trim Patterns
- Mob Effects
- Armors / Tools
- Banner Patterns
- Pottery Sherds
Within the base version we have added support for all Belgie's mods but if you want to add support for your mods you can with a datapack by adding jsons in "data/namespace/item_codex/item.json"
Options you can customize:

There is also a debug option for adding your own items in the screen, inside of the item_codex config you can enter a list of mod ids (example: "minecraft"), once you have the list of mod ids you can run the command "/refresh_codex" and you will see how many items within the mod ids have not been registered within the item codex screen
Project description from CurseForge.
Pick your setup
Item Codex by Minecraft version and loader
Choose the version and loader you play, then open the matching release.
26.2
1 loader build26.1.2
1 loader build26.1.1
1 loader build26.1
1 loader build1.21.7
2 loader builds1.21.6
2 loader builds1.21.5
2 loader builds1.21.4
2 loader builds1.21.1
1 loader buildCheck the dependencies, then try the file in a copied instance before changing a world you care about.
Recent files
Item Codex versions and loaders
Booklet-Forge-1.21.6-1.0
Booklet-Forge-1.21.6-1.0.jar
13 Jul 2025
Looking for an older file? The official CurseForge project page is in Resources.

