Jupiter Mod is a library mod that provides an auto-sync configuration system and in-game config editing tools for Minecraft Fabric, Forge, and NeoForge.
Jupiter solves a common modding headache: config files that are awkward to manage, hard to keep consistent, and annoying to update across clients and servers. With more than 1.39 million downloads on Modrinth, it has already proven useful to a large audience of mod developers, modpack authors, and server admins who want a cleaner way to handle settings.
Key Features of Jupiter Mod
- In-game config screens — Jupiter gives users a convenient place to change settings without leaving Minecraft. That matters because it reduces back-and-forth between the game and text files, which is especially useful when you are testing a pack or adjusting a server-friendly mod on the fly.
- Auto sync on dedicated servers — The library can sync configs automatically when you connect to a dedicated server, as long as you have the proper permissions. For players, that means fewer mismatched settings; for server owners, it means the server can enforce the intended configuration more reliably.
- Simple config creation — Jupiter is built to make creating a config instance straightforward. That is valuable for developers because it lowers the friction of adding a structured config system instead of hand-rolling one from scratch.
- Broad built-in value support — It supports common config value types such as int, double, string, and list. In practice, that covers a lot of everyday mod settings, from gameplay numbers to text-based options, without requiring extra plumbing.
- Codec-based custom entries — Jupiter also lets you define config entries for custom value types through codecs. This is the part that makes it feel like a real library rather than a fixed menu system, because it can adapt to more complex data models.
- Permission control for server configs — On dedicated servers, permissions can control who is allowed to change certain config values. That helps keep admin-only settings protected while still letting trusted users manage the options they are supposed to touch.
- Extra config system support — Jupiter can load configs from other systems and still apply its own features, including auto-generated screens and server sync. The supported systems mentioned in the mod description are (Neo)Forge config and Cloth Config API, which makes Jupiter more flexible in mixed modding setups.
How to Install Jupiter Mod
- Install a supported mod loader for your setup, such as Fabric, Forge, or NeoForge.
- Make sure you are using a Minecraft version that matches the Jupiter build you want, such as 1.21.10, 1.20.1, or one of the other listed releases.
- Download the correct Jupiter file from the download table below and choose the version that matches your loader.
- Place the jar file into your Minecraft
modsfolder. - Launch the game, then open the relevant config screens in-game or configure server-side permissions if you are using Jupiter on a dedicated server.
Requirements & Compatibility
| Requirement | Details |
|---|---|
| Mod Type | Library, utility, game-mechanics |
| Loaders | Fabric, Forge, NeoForge |
| Minecraft Versions | 26.1, 1.21.10 through 1.18 |
| License | LGPL-3.0-or-later |
| Author | IAFEnvoy |
| Published | 2024-07-28 |
| Updated | 2026-03-27 |
| Source Code | GitHub repository |
| Compatibility Note | Jupiter V2 is not compatible with mods based on V1. |
Pros and Cons
Pros
- Built for in-game config editing, which makes settings easier to manage.
- Supports automatic sync on dedicated servers with permission control.
- Handles common config types and also supports custom codec-based entries.
- Works across Fabric, Forge, and NeoForge, which is helpful for multi-loader projects.
- Can load configs from other systems and still apply Jupiter features.
Cons
- It is primarily a library, so most players will only need it if another mod requires it.
- Jupiter V2 is not compatible with mods built around V1.
- Dedicated-server syncing depends on proper permissions, so it is not fully automatic in every setup.
- The mod is aimed at config management, not gameplay content, so it is not a standalone feature pack.
Alternatives to Jupiter Mod
- Cloth Config API is a familiar config screen library that Jupiter can also load through its extra config system.
- Forge Config API Port is relevant if you are working with Forge-style config workflows and want a universal API path.
- Malilib is worth comparing if you like the style of config screen design that partly inspired Jupiter.
Download Jupiter Mod
| Minecraft Version | Fabric | NeoForge |
|---|---|---|
| For Minecraft 26.1 | Download | Download |
| For Minecraft 1.21.10 | Download | Download |
| For Minecraft 1.21.9 | Download | Download |
| For Minecraft 1.21.8 | Download | Download |
| For Minecraft 1.21.7 | Download | Download |
| For Minecraft 1.21.6 | Download | Download |
| For Minecraft 1.21.5 | Download | Download |
| For Minecraft 1.21.4 | Download | Download |
| For Minecraft 1.21.3 | Download | Download |
| For Minecraft 1.21.2 | Download | Download |
| For Minecraft 1.21.1 | Download | Download |
| For Minecraft 1.21 | Download | Download |
Always download mods from official sources to stay safe.
Frequently Asked Questions
Is Jupiter Mod compatible with V1-based mods?
No — Jupiter V2 is not compatible with mods based on V1. If you are updating an existing setup, check every dependent mod before switching versions so you do not break your config workflow.
Does Jupiter support Fabric, Forge, and NeoForge?
Yes — the mod is listed for Fabric, Forge, and NeoForge. You should pick the build that matches both your loader and your Minecraft version.
Can Jupiter sync configs with dedicated servers?
Yes — it can auto sync configs when you connect to a dedicated server and you have the proper permissions. That is useful when you want the server to keep control over shared settings.
Can developers add custom value types to Jupiter?
Yes — Jupiter supports codec-based custom config entries. That means developers are not limited to int, double, string, or list values, which makes the library more flexible for advanced mods.
Is Jupiter mainly for players or developers?
It is mainly for developers, though players benefit from the in-game screens and sync features. If you are only playing vanilla Minecraft, you usually do not need Jupiter unless another mod depends on it.
Which Minecraft versions does Jupiter support?
It supports Minecraft 26.1 and the 1.21.10 through 1.18 line shown in the download data. Use the exact file that matches your game version to avoid loading issues.
