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How To Add Mods To A Modpack (Client Side)

Last modified on Sep 9, 2022 in General

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Having a modded Minecraft server is a great way to customize your gameplay experience. However, playing with mods is not as simple as just uploading them to your server. For every mod that you add to your server, you will also have to add it to your client-side game. Minecraft by default does not run mods so you need to use a mod loader, like Forge. Many players will prefer to use launchers to install and run the modpacks for them. Some of the most popular modpack launchers include CurseForge, Technic, ATLauncher, Voidswrath, and FTB. Adding mods to an existing modpack is fairly easy, this guide will walk you through the basic steps for each of the most popular launchers.

This tutorial does not cover how to add mods to the default launcher. You can find our guide on doing so here.

How to download mods

  1. You need to get the mods from CurseForge or the mod author’s official site. Doing this ensures that you won’t get corrupted files or viruses.
  2. Once you decide on a mod you want, click the name to open the mod page.
  3. Open the Files tab to view the versions. To the right of the version you want, press download. It’s best to download the latest recommended update for your version of Minecraft.
  4. Head back to the mods page and open the Relations tab. This is very important as these are the mods you need for it to work correctly. If you don’t download the dependencies, the mod will not function properly or can cause the game to crash.


How to add mods to an existing modpack


  1. Open CurseForge app and click on the modpack you want to edit.
  2. Click on the three dots next to the orange “play” button and choose “profile options”.
  3. In the new window, check the box that says “Allow content management for this profile”, then click on the orange “Done” button.
  4. A new “Add More Content” button will appear on the profile. Click on it, then search for the mod you want to add.
  5. Click on the orange “install” button next to the mod you are wanting. The app will install the mod and any dependencies for you



  1. Open the Technic Launcher and go to the Modpacks tab at the top.
  2. You will see a list of your modpacks here, click the modpack that you would like to add additional mods to.
  3. Click Modpack Options towards the top right of the pack.
  4. Press the Open button to the right of the directory listing, then enter the mods folder.
  5. Drag in the mods that you would like to add, then go back to the Technic Launcher and click Play on the pack. Once you launch Minecraft, the mods should be added in.



  1. Open the ATLauncher and navigate to the Instances tab to the right of the launcher.
  2. Now you will see a list of the mod packs that you have downloaded, scroll to the modpack that you would like to add the additional mods to and click Open Folder.
  3. Open the mods folder and you can now drag in your desired mods. Head back to the launcher and click Play on the pack, this will launch Minecraft.



  1. Open the Voidswrath Launcher.
  2. To the left of the modpack you want to add mods to, click on “Advanced”.
  3. Click “Edit Mods” and this will open the mods folder. Add the mods into this folder and close the explorer.
  4. Head back to the launcher and press “Play” on the pack.



  1. Open the FTB launcher and navigate to the “My Modpacks” tab.
  2. On this page, hover your mouse over the modpack you want to add mods to and click the 3 dots.
  3. To the top right of the page, click on “Open Folder”.
  4. Enter the mods folder and drag in the mods. Close the explorer and head back to the launcher.
  5. Click “Play” to launch the modpack with the added mods.


Common Issues

Minecraft Crashes on startup

When adding a mod to an existing modpack, it is very important that you check to make sure you are not missing any dependency mods. If you are, it can cause your game to crash upon loading.

I am getting Mod Rejections when trying to join a server

Having a mod rejection either means that the mod is not the same version as the one from the server, or that you are missing a mod on your Minecraft client that is on your server or vice versa. Double-check that your mods folder from the client-side matches with the server-side mods folder. Although, keep in mind that you do not need to add client-side only mods to the server. For example, Optifine should only be installed on on your Minecraft client, it does not go onto the server.

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