How to Add Mods to a Modpack (Client Side)

Minecraft allows players to completely transform gameplay through the use of Forge or Fabric modifications. These mods can introduce new creatures or building blocks to the game, among many other possibilities. Most players use modpacks, extensive collections of modifications to create a unique experience. However, sometimes features that you or others want are missing from the pack. This leads them to add mods to the modpack, making it even bigger. The process for doing this varies by client, which can be a bit confusing for new modders. With this in mind, we have created this Holy Hosting tutorial to show you how to add mods to a modpack through popular launchers.

Finding and downloading mods

Before attempting to add modifications to modpacks, you will want to make sure you have downloaded the correct ones. In other words, make sure to get mods for the correct game version, type, and all their dependencies. We strongly recommend checking our guide for safely and properly downloading the desired modifications. Also make sure to save these files somewhere easily accessible on your computer, as it will make it easier to add them to your modpack.

Adding mods to a modpack

Minecraft Mods

Whether you want to customize small or large modpacks, adding additional mods is something most players try to do. This changes some features of the pack, which some may feel are necessary to have more suitable gaming experiences. Others may simply experiment with mod combinations to see what works best for them. Regardless of your reason, doing this is different for each launcher, which can cause some confusion. Fortunately, all of these clients have user-friendly interfaces that make the process easy. Choose your launcher from the sections below to start adding more mods to your desired modpack.

CurseForge Application

Open the CurseForge application, then head to My Modpacks.

Locate and select your desired pack from the list.

On the next screen, click the three vertical dots on the right.

From the options list, press Open folder to reveal the pack files.

Proceed to find and enter the mods folder.

Drag and drop the desired mod files into this area.

Technic Launcher

Launch the Technic launcher and navigate to the Modpacks section.

From the pack list, locate and select the one you want to add more mods to.

Once there, press Modpack Options in the upper right.

In the dialog box, click the Open button to reveal the pack files.

Find the mods folder and place your desired modifications in the area.

ATLauncher

Launch ATLauncher and continue to the Instances section.

From your downloaded modpacks, locate the desired one for this process.

Once found, press the Open folder button near the bottom right.

Continue entering the mods directory and place your mod files in the folder.

Voidswrath

Open VoidLauncher, then select your desired modpack on the left.

Continue pressing Edit Pack on the far right of it.

Then, choose the Edit Mods option to open the files.

Drag and drop your desired mods into the newly opened window.

FTB Application

Run the FTB application and head to the Library section.

Locate your downloaded modpack and select it.

Once there, press the three vertical dots next to the Play button.

Hover over Open and then click Mods Folder to reveal its files.

Continue dragging and dropping your desired mods into this newly opened window.

Common issues:

Minecraft crashes

After adding mods to a pack and the game or launcher crashes, you may have overlooked a required dependency. These are modifications that depend on others for compatibility. Sometimes, there may be several mods you need to install in addition to the main one you want. Usually, these dependencies are found on the Relations tab on the mod's CurseForge page, but they can also be in the description. However, the game can sometimes crash because the mods are incompatible. This rarely happens, but it is something you cannot fix due to the modification's design preventing a successful launch.

Connection refused

Make sure to add mods to the server when you have done so on your launcher, as this is necessary for a stable connection. Otherwise, you will be rejected due to a mismatched mod list error. Essentially, the server and client must have the same mods unless they are specified for only one or the other. Once all modifications are aligned on both ends, join the server to see if it works.