
Modrinth · Minecraft modpack
SlimLine
A lightweight modpack for Legacy Fabric 1.8.9 that aims to simplify, optimize, and refine the vanilla experience
Quick answer
Which SlimLine release should I use?
SlimLine 1.8.9 - v1.1.1 is a complete pack release for 1.8.9 with Fabric 0.18.4. Install it as its own launcher instance. If the creator publishes a separate server file, make sure it names this exact pack release. 11 mods in this pack file.
Pack setup
How should I set up SlimLine for players and a server?
Use SlimLine 1.8.9 - v1.1.1 as the pack version. Install the pack as its own launcher instance. The creator’s listing does not name a separate server file, so check the release notes before setting up a dedicated server. Do not upload the ordinary client folder blindly.
A pack is a matched client and server setup, not one mod with an install-side label. Keep its release, loader, manifest and overrides together.
These numbers come from the pack file you chose. “Not labelled” means we don’t know which side it belongs on—not that it is safe everywhere. The file count is not a RAM estimate.
What are the server requirements for SlimLine?
SlimLine 1.8.9 - v1.1.1. Change the pack release and its contents or setup may change too.
The selected pack release is SlimLine 1.8.9 - v1.1.1. That file is for Minecraft 1.8.9 with Fabric 0.18.4. It contains 11 mod projects. The creator’s listing does not name a separate server file. Check their notes before using one, and do not upload an ordinary client folder or rebuild the pack mod by mod. A file count cannot tell us the right RAM, CPU or storage; size the server for the players and world you actually run.
About this project
What kind of pack is SlimLine?
SlimLine 1.8.9
SlimLine is a lightweight modpack for Legacy Fabric 1.8.9 that aims to simplify, optimize, and refine the vanilla experience.
It is designed to be as unobtrusive and stable as possible, while offering notable performance improvements (especially for older machines), together with some quality-of-life enhancements.
Due to its nature, SlimLine should be fully interoperable with vanilla, allowing servers and clients to connect with each other seamlessly.
Made and tested with Prism Launcher. Compatibility with other launchers wasn't tested.
Feature List
Performance Optimization
Through Alternate Current, Phosphor-Legacy, Ksyxis, and SleepBackground, the performance of the game is optimized while conserving behavior and compatibility.
Mipmaplevel and Language Fix makes changing language nearly instant.
Ksyxis can be disabled if you need to use the spawn chunks functionality (e.g. for automatic mob farms that require it).
Note: Optifine could be added to the modpack (through Legacy Optifabric), but it was left out to better preserve vanilla behavior and interface.
Bug Fixes
Legacy VanillaFix, legacy-crash-fix, and MouseDelayFix-fabric are used to fix small bugs within the game, such as the hand glitching when riding minecarts, and cursor inaccuracies when moving the mouse quickly with low fps.
Improvements
- TabFocus brings keyboard control to select and click buttons in the game menus;
- Realms Button Remover helps to clear up the title screen;
- Legacy Better Ping Display adds ping values in the multiplayer tab menu;
- legacy chunk borders brings the modern chunk border view with F3 + G;
- Show My Hunger makes the hunger bar visible when riding a boat or minecart.
- Extra Options backports the distortion effects and FOV effects accessibility settings.
- Don't Clear Chat History makes it so chat history isn't cleared after disconnecting and relogging to a server.
- MenuFPSUnlocker raises the frame rate of the main menu from 30fps to 120fps.
Title Screen Preview

As stated, no Realms button, as well as no mod menu button, to keep the interface clean ;)
Icon created with TextStudio and GIMP
Project description from Modrinth.
Mods in SlimLine 1.8.9 - v1.1.1
Open any mod on Modpacks.ch to check its files and dependencies.
d4da695502fab96e6e77d6a4730186a9caf6955f · Modrinth version uUNcjhcy · Project link unavailable Client only950b4ebbe3c29f632ddf24efaca85e799268413c · Modrinth version kAhTG6ED · Project link unavailable Client only143fe088170e5777d3ccf5b488d61ee3635ebffe · Modrinth version vCQj9Ui7 · Project link unavailable Server only9776f5c6763a54a312d397b2ac88347422f173ec · Modrinth version aWmzozf8 · Project link unavailable Client only89cb70915470cd108b4334461394147c96a71786 · Modrinth version hp3oZxHx · Project link unavailable Client only9d24f25ac6ed5c14020443aaafa86e636f67c85c · Modrinth version dwTGmOTs · Project link unavailable Side not labellede6c8caef5c46228837b883e8d103e82984658f12 · Modrinth version CASpOXB7 · Project link unavailable Side not labelled91ef5d33f498cc4d6e38f163540ed716097096b2 · Modrinth version qcEKR94s · Project link unavailable Client only54c259b7a0a5065dcc439b3cf45b82db003a9dc2 · Modrinth version UdBfSdpd · Project link unavailable Side not labelled5e6dae3b52569544d6903720018b70b374d30ddf · Modrinth version W5lv2N12 · Project link unavailable Client onlye0b18041b49c794db036f1bb5d74edd5ddec8a36 · Modrinth version 3vB0ZF3L · Project link unavailable Client onlyPick your setup
SlimLine by Minecraft version and loader
Choose the version and loader you play, then open the matching release.
Made local changes? Try them in a copied instance before touching a world you care about.
Recent files
SlimLine versions and loaders
Looking for an older file? The official Modrinth project page is in Resources.