UltralightFabric
A HTML renderer for Fabric
About this Mod
UltralightFabric
UltralightFabric is an implementation of Ultralight for Fabric.
This implementation was not a work of my own but of a project called LiquidBounce which is unfortunately a hacked client. It has been adapted into a library that everyone is free to use.
Developing
Developers: For information about using UltralightFabric in your own mod, consult the wiki
Requirements
Available Versions
How to Install UltralightFabric 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 (1.18.1).
Install Mod
Open the mod browser in the dashboard and search for "UltralightFabric". Click "Install" – done! Alternatively, upload the .jar via SFTP to the /mods folder.
Compatibility
Mod Loaders
Minecraft Versions
1.18.1
Server-side
✗ UnsupportedRecommended RAM
4 GB(min. 3 GB)Frequently Asked Questions
UltralightFabric 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 (1.18.1). You can switch loaders with one click in the panel.
Is UltralightFabric compatible with fabric?
UltralightFabric officially supports fabric for Minecraft 1.18.1. The Mado dashboard automatically detects incompatible loader combinations.
Server lagging with UltralightFabric – how to optimize performance?
Recommended RAM: 4 GB (per 8 players). Use /spark profiler to check if UltralightFabric 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.
Similar Mods
Rent Modded Server
Install UltralightFabric with just one click on your server.