ChemLib Custom Compounds
by Karma Krafts
ChemLib Custom Compounds lets modpack creators add their own compounds to ChemLib through JSON configuration files alone.
What it does
The mod is an addon for ChemLib. Compounds are defined in JSON files, so a modpack author can add new chemical compounds without writing Java code. Because it needs only configuration files, it stays lightweight compared with scripting through a tool such as KubeJS. Client and server both need the mod, and it is published for Forge 1.20.1 under the Apache License 2.0, which is open source.
Key features
JSON compound definitions
New compounds are declared in JSON files that follow a documented structure, with no compilation step.
Modpack-friendly setup
Pack creators can add elements and compounds by editing files in the configuration folder.
Lightweight addition
The addon adds only data definitions on top of ChemLib, instead of a scripting layer that runs custom code.
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
How it compares
KubeJS Alchemistry/Chemlib is a Forge option for 1.20.1 – 1.20.6 that is not open source, with All rights reserved terms. Compound V is open source under the GNU Lesser General Public License v2.1 only and supports 1.20.1 on Forge with client and server environment.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| ChemLib Custom Compounds | Forge | 1.20.1 | Client and server | 2024-10-21 |
| KubeJS Alchemistry/Chemlib | Forge | 1.20.1 – 1.20.6 | Client and server | 2025-08-30 |
| Compound V | Forge | 1.20.1 | Client and server | 2026-08-07 |
Questions
Does ChemLib Custom Compounds need ChemLib installed?
Does the server need the mod?
In the catalog
ChemLib Custom Compounds is one of 36,990 Utility mods on ModsFinder, and one of 14,575 Utility mods for Forge. 34,764 mods support Minecraft 1.20.1.
More from Karma Krafts
Similar mods
What the author says
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…
Official listing
- Modrinth page
- modrinth.com/mod/chemlib-custom-compounds
- Owner
- Karma Krafts
- Published
- 2024-10-09
- Updated on Modrinth
- 2024-10-21
- Facts verified
- 2026-10-15