Introduction

SideShift is a desktop app that converts Minecraft modpacks into ready-to-run server packages: it decides whether each mod is needed on the server, fills in the required components, and packages everything into an archive you can upload and start.

What it does

• Reads three common modpack formats:
  • .mrpack (Modrinth modpacks)
  • CurseForge official export .zip
  • Plain .zip archives that contain a mods folder
• Decides whether each mod belongs on the server, and shows the reasoning
• Searches and adds mods from Modrinth and CurseForge — no API key required
• Fills in server-side basics (such as Fabric API) and can install loaders locally (Forge / NeoForge / Fabric)
• Generates start scripts and common server configs (EULA, port, JVM flags)
• Checks for app updates in place, with one-click upgrades

When to use it

You downloaded a modpack to play with friends, but a server needs a different mod list than the client — minimaps and shaders are useless server-side, while missing dependency libraries break the startup. Picking mods by hand is slow and error-prone. SideShift does that filtering and assembly for you.

What it does not do

• It never modifies the contents of any mod
• It is not a game launcher and does not run the server for you (how you start the unpacked server is up to you)

Keep reading

• Quick Start: four steps to a server package
• Auto Classification: how the decision is made