This mod is a small addon for the ChemLib mod and allows modpack creators to add their own elements and compounds to the mod using only JSON configuration files which is a lot more lightweight than using somethingn like KubeJS.
This mod does not currently allow removing existing elements or compounds. If you require this feature, please open an issue and i'll see what i can do.
Your custom configuration can be added as config/chemlibcc/elements.json and config/chemlibcc/compounds.json. The format is the same as used by the mod itself, except there's an additional display_name property for every entry to faciliate translations.
A custom compound configuration might look like the following:
- Edition: Minecraft Java
- File type: .jar
- Minecraft version listed: 1.20.1
- How to install: Install the matching mod loader (Forge, Fabric or NeoForge) for your Minecraft version. → Download the .jar. → Put it in the .minecraft/mods folder and launch that loader profile.
- Where to get it: Opens on Modrinth — not every file is mirrored on our own servers.
Install steps are the general flow for this file type — How to install Minecraft Java mods & modpacks walks through it step by step.
- Ships as chemlibcc-1.20.1-1.1.0.20.jar — drop this file into the mods folder
- Download size: 43 KB
- Download link checked 31 Aug 2026 — working
These come from our own check of the pack file, not from the source page.