How to Install a Custom JAR (Custom Server Type)

We have a video tutorial available which explains the process to install a custom jar:

It is possible to install any server type or mod pack on your server with us, even if it isn't already available on the control panel. To do this, you will need to install it as a custom jar.

  1. Select the Custom Jar option from the Server Type dropdown menu on your Multicraft control panel (

    Minecraft Custom Jar

  2. With an FTP client, upload the server JAR file you wish to use into the base directory of your server (the top-most root/default directory). We have a tutorial on how to use an FTP client called Filezilla here: How to use FileZilla for FTP (File Management)

  3. Once you have uploaded your server JAR, rename it to custom.jar. Make sure that these are all in lower-case, otherwise, it will not load properly.

    Custom JAR

  4. If you're installing a server type that requires extra files (usually additional libraries) such as Forge, SpongeForge or any mod pack, you will also need to upload these. These are generally generated by running the installer for a server type on your own computer, then uploading the files it downloads onto your computer.

That's all! Once you restart your server, it will begin loading your custom server JAR.

If you require any further assistance, please contact our support at:

Mitchell Smith

Managing Director @ Shockbyte

  • minecraft, multicraft, custom jar, server type, forge, sponge, spigot, paperspigot
  • 189 Users Found This Useful
Was this answer helpful?

Related Articles

Changing Your Minecraft Game Mode

Minecraft servers have 5 game modes to choose from: Survival, Creative, Hardcore, and...

Giving Operator (OP) to a Player

We have a video tutorial for giving OP to a player:   Important note: Players that you OP...

How to Configure Autosaving of Your Minecraft World

Minecraft servers have the ability to automatically save world data periodically. By default,...

How to Create a Flat World for Your Minecraft Server

We have a video tutorial for creating a flat world:   A flat or superflat world in Minecraft...

How to Disable Player Advancement Announcements

Advancement is a feature available exclusively on Minecraft Java Edition wherein players can...