Codecium
A Fabric mod that vastly improves codec error messages.
Fabric
- Loaders
- Fabric
- Downloads on Modrinth
- 3.2K
- Followers on Modrinth
- 23
- versions
- 5
- Updated
- July 23, 2026Jul 23
- Published
- in 2025
Comparisons — A comparison between error messages in vanilla and this mod. · swipe
At a glance
A library: other mods need it
Runs on Fabric
For Minecraft 1.21.4–26.3
Works on either side — install it in the game, on the server, or both
Latest version — 1.2.2+26.3 from July 23, 2026
License MIT — free
Where it's neededGame versions1.21.4–26.3
In gameoptionalOn serveroptional
Works both in the game and on the server — install where you need it
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"}}
FAQ
How to install Codecium?
Install Fabric for your Minecraft version, download Codecium for the same version and loader, put the file into the mods folder and launch the game with the loader profile.
Which Minecraft versions does Codecium support?
Codecium has builds for Minecraft 1.21.4–26.3.
Is Codecium needed on the server?
Works on either side — install it in the game, on the server, or both
License and source
MIT Licensefree to use and share with credit to the author
