About this Mod
JeffMod
This mod adds many Jeff-related features to the game!
Healing Bubble 
Jeff's most iconic ability is being able to throw healing bubbles at allies, to speed them up and heal them.
In this mod, throwing a healing bubble at an entity grants them Speed 2 and Regneration 2 for 10 seconds, as well as Instant Health.
Pacifist (enchantment)
Jeff doesn't like to hurt people. That's why, in this mod, there is an enchantment that heals rather than hurts
This enchantment converts all damage to healing. It can be applied to all weapons.
Purified (potion effect)
Jeff hates getting those annoying effects, like Poison and Instant Damage. This potion makes you immune to them.
This potion effect makes it impossible for you to get any harmful potion effect.
Available Versions
How to Install JeffMod on Your Server
Order Server
Order a Minecraft Java server with at least 3 GB RAM (4 GB recommended).
Set fabric Loader
In the panel under "Egg", select the fabric loader and matching Minecraft version (1.21.11).
Install Mod
Open the mod browser in the dashboard and search for "JeffMod". Click "Install" – done! Alternatively, upload the .jar via SFTP to the /mods folder.
Compatibility
Mod Loaders
Minecraft Versions
1.21.11
Server-side
✗ UnsupportedRecommended RAM
4 GB(min. 3 GB)Frequently Asked Questions
JeffMod server crashes on startup – what to do?
Most common cause: wrong fabric version or insufficient RAM. Check the server log (latest.log) for "OutOfMemoryError" or "Mixin" errors. With Mado Hosting: ensure at least 3 GB RAM is allocated and the loader matches the mod version (1.21.11). You can switch loaders with one click in the panel.
Is JeffMod compatible with fabric?
JeffMod officially supports fabric for Minecraft 1.21.11. The Mado dashboard automatically detects incompatible loader combinations.
Server lagging with JeffMod – how to optimize performance?
Recommended RAM: 4 GB (per 8 players). Use /spark profiler to check if JeffMod consumes the most tick time. Common fixes: reduce server view-distance to 8-10, install "performant" or "starlight" as supplementary mods on Forge. With Mado Hosting, your server runs on NVMe SSDs with dedicated CPU cores for minimal latency.
Rent Modded Server
Install JeffMod with just one click on your server.