Jauml
Jauml is a configuration library that other mods use to read and write JSON settings files under the Minecraft config folder.
What it does
A mod declares its settings through Jauml, and the library generates and updates the matching JSON files in the usual config location. When a value is invalid or missing, Jauml checks it and restores a safe default. Players rarely install Jauml on purpose; it usually arrives because another mod requires it.
Jauml is a dependency, not a standalone feature set, so the exact keys and options depend on the mod that uses it. It runs on client and server, and the server and every player need it whenever a dependent mod does. It is open source under the Apache License 2.0 and published for Fabric, Forge and NeoForge, with builds covering 1.16.5 – 26.3 across 13 release versions.
Anyone may use, change and pass along Jauml under the Apache License 2.0, which is an open source license. Its source code and issue tracker are public. The latest files for Fabric, Forge and NeoForge are dated 2026-09-30.
Key features
Declared settings
Mods register their settings through Jauml instead of writing config parsing code of their own.
JSON config generation
Config files are created and refreshed as JSON under the standard Minecraft config folder.
Value validation
Invalid or missing values are detected and replaced with defaults the mod has declared as safe.
Lightweight design
The library is kept small so that dependent mods carry little extra overhead for their configuration.
Compatibility
Latest build for each game version and loader.
26.x5 of 5 versions with builds
1.21.x4 of 4 versions with builds
1.20.x1 of 1 version with builds
1.19.x1 of 1 version with builds
1.18.x1 of 1 version with builds
1.16.x1 of 1 version with builds
Only full game releases are shown. This mod publishes no snapshot builds.
Required by 7 mods
Use cases
Dependent mods
Mods such as RPG Attribute System, Remnant Bosses, Mob LootBags, Much More Dungeons and Finetunned Weaponry rely on Jauml for their configuration files.
Modpack configuration
Pack builders in large modpacks can edit the generated JSON files to adjust the settings of each dependent mod.
Who it’s for: Mod developers who want a shared way to declare and validate JSON configuration, and players who need the library installed for a mod that requires it.
Questions
Does Jauml need to be installed by players?
Do server owners need Jauml?
Which loaders does Jauml support?
Where are the settings for a mod using Jauml?
In the catalog
Jauml is one of 3,545 Optimization mods on ModsFinder, and one of 2,575 Optimization mods for Fabric. 8,071 mods support Minecraft 26.3.
More from NightBeam Studio
Similar mods
What the author says
This beta release of Jauml lays a solid foundation for managing mod configurations in Minecraft. Whether you're adding new settings or validating existing ones, this library streamlines the process with clean, maintainable code. It’s an essential tool for mod developers looking to enhance their projects with flexible…
Official listing
- Modrinth page
- modrinth.com/mod/jauml
- Owner
- NightBeam Studio
- Published
- 2025-06-06
- Updated on Modrinth
- 2026-09-30
- Facts verified
- 2026-10-15