Slo

Load servers as singleplayer worlds

2.3K Downloads

fabricoptimizationutility

Configure a Compatible Minecraft Server

Screenshots

About this Mod

Slo: Server Loader

With Slo installed, Minecraft servers in your saves directory will be available during world selection. With the right configuration, you can even choose the server type when creating a world!

Additional Features

Open the server console in-game (` by default)
Autodetect server JAR files, auto-accept EULA
Seamless integration with Minecraft's UI

How It Works

Configuration

Slo supports server presets—templates for a server save—that users can choose from when creating a world. The mod loads these presets from the configuration directory; alternatively, users can drag and drop presets into the selection screen. To learn how to create these presets, visit the wiki.

License

Note: by running this mod, you agree to Minecraft's End User License Agreement (EULA).

Available Versions

1.1.0release

MC 1.21.5fabric

June 6, 2025

1.1.0release

MC 1.20.4fabric

June 6, 2025

1.1.0release

MC 1.20.1fabric

June 6, 2025

1.0.0release

MC 1.21.5fabric

May 28, 2025

How to Install Slo on Your Client

Install the Mod Loader Locally

Install fabric for your local Minecraft version.

Download the Matching File

Choose the Slo file for fabric and Minecraft 1.21.5.

Install Mod

Place the .jar file in your local .minecraft/mods folder and restart Minecraft. No server-side installation is required.

Compatibility

Mod Loaders

fabric

Minecraft Versions

1.21.5, 1.20.4, 1.20.1

Server-side

✗ Unsupported

Recommended RAM

4 GB(min. 3 GB)

Frequently Asked Questions

Does Slo need to be installed on the Minecraft server?

No. Modrinth marks Slo as unsupported on the server side. Install it only in your local Minecraft mods folder. Your server can remain unchanged unless the mod page lists an additional dependency.

Which version and loader does Slo require?

Use a file for fabric and your exact Minecraft version. Supported versions include 1.21.5, 1.20.4, 1.20.1. Files for different loaders are not interchangeable.

Slo is not working – what should I check?

First check the Minecraft version, loader version and required dependencies. Put the .jar file in your local .minecraft/mods folder and remove older duplicates. Because this mod is client-side, adding server RAM will not fix it.