Installing a modpack

There is no one-click install: a modpack goes in two steps, the mod loader first, then the modpack's files. Allow about ten minutes.

1. Get the server pack

On the modpack's page (CurseForge or Modrinth), download the server file (often called Server Pack or Server Files) for the version you want, and note which loader (Forge, NeoForge or Fabric) and Minecraft version it requires.

2. Install the right loader

1. Create a backup if the server already holds a world.
2. Open Settings → Software and version, pick the modpack's loader and Minecraft version (see changing software or version).
3. Let the installation finish in the console.

3. Upload the modpack's files

1. Stop the server.
2. In the Files tab, upload the server pack's .zip archive, then use Extract.
3. Put the mods/ and config/ folders (and defaultconfigs/, kubejs/ if present) at the server root, replacing the existing ones.
4. Delete the archive to free disk space, then start the server.

An archive too large for the browser goes through SFTP (see connecting over SFTP). Start scripts shipped in the server pack (start.sh, run.bat) aren't needed: startup is already handled by the client area.

Sizing your RAM

A heavy modpack (100+ mods) typically needs 6 to 8 GB minimum — see our per-modpack recommendations. Size it with some headroom: unlike disk or CPU, the JVM heap genuinely fills up, and it is what decides how the server feels.

Updating a modpack

Updating a modpack sometimes changes the world save format — always back up your world before a major version upgrade (see backups).