
Modrinth · Minecraft mod
Codecium
A Fabric mod that vastly improves codec error messages.
Quick answer
Which Codecium release matches 26.2-pre-5?
Codecium 1.2.0+26.1 targets 26.1-snapshot-1, 26.1-snapshot-2, 26.1-snapshot-3 with Fabric. Installation on the client is optional. Installation on the dedicated server is optional. No extra mods listed for this file.
Where it goes
Is Codecium required on the client, server, or both?
Installation on the client is optional. Installation on the dedicated server is optional.
The source marks this as usable on both the client and server.
What else does Codecium 1.2.0+26.1 need?
1.2.0+26.1 on 26.2-pre-5. 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 Codecium without breaking your instance.
Built for Codecium 1.2.0+26.1 on 26.2-pre-5. Pick another file and the loader, install side or required mods may change.
- 01
Stick to this file
Use 1.2.0+26.1. It targets 26.1-snapshot-1, 26.1-snapshot-2, 26.1-snapshot-3 with Fabric; 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
Installation on the client is optional. Installation on the dedicated server is optional.
- 04
Pick the file you checked
Use the “Get this file” button beside 1.2.0+26.1. It opens that exact file at the source.
About this project
What does Codecium add?
Codecium is a Fabric mod that vastly improves Codec error messages.
This mod was made because most of the current error messages are not useful at all.
The name is a play on the term Codec and the common use of periodic table elements for Minecraft mods.
Examples and Comparisons
Commands used:
/give @s minecraft:stick[minecraft:food={saturation: "text"}]/item modify entity @s weapon {function: "minecraft:set_components", components: {"minecraft:rarity": "uncommon", "rarity": "rare"}}/item modify entity @s weapon {function: "minecraft:set_enchantments", enchantments: {"minecraft:fake": "oops"}}

Project description from Modrinth.
Pick your setup
Codecium by Minecraft version and loader
Choose the version and loader you play, then open the matching release.
26.3-snapshot-6
1 loader build26.3-snapshot-5
1 loader build26.3-snapshot-4
1 loader build26.3-snapshot-3
1 loader build26.3-snapshot-2
1 loader build26.3-snapshot-1
1 loader build26.2-snapshot-8
1 loader build26.2-snapshot-7
1 loader build26.2-snapshot-6
1 loader build26.2-snapshot-5
1 loader build26.2-snapshot-4
1 loader buildShowing the newest 12 of 54 game versions. Older files are in the list below.
Check the dependencies, then try the file in a copied instance before changing a world you care about.
Recent files
Codecium versions and loaders
1.2.0+26.1
codecium-1.2.0+26.1.jar
26 Jan 2026
Looking for an older file? The official Modrinth project page is in Resources.