Client-side mods, in a few words, are mods that generally affect the client-side, such as graphics, sound, user interface and etc.
If you’re in doubt, good examples are Minimap mods or GUI mods, that changes how your HUD looks like or how your inventory appears and stuff likewise.
When installing mods on your server you should be careful not to upload these mods as they may cause your server to crash or even corrupt the world.

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Examples

Client-side Mods can be generally defined as Mods that change the player-side part.
As an example let’s get two famous Mods.

• Biomes O’ Plenty
• This Mod is not a client-side mod because it changes the Game by adding new Biomes to the Minecraft World. This affects the Minecraft Itself.
• Optifine
• This is a client-side mod because Optifine changes animations, graphics, sounds functions and etc that are only affects the player-side.

Other examples of client side mods that shouldn’t be installed on the server:

• 3dSkinLayers
• AmbientSounds
• Antique Atlas Overlay – Minimap
• ArmorSoundTweak
• Auudio [Forge]
• BackTools
• BaublesHUD
• BetterAnimationsCollection
• BetterAdvancements
• Better Foliage
• BetterFPS
• BetterF3
• BetterFoliage
• Better Mount HUD
• BetterThirdPerson
• Camera
• Capes Mod
• Chunk Animator
• ClientTweaks
• Controlling
• Ctgui
• Distant Horizons
• Drippy Loading Screen [Forge]
• Dynamic Music
• DynamicSurroundings
• Enchdesc
• Entity Culling Fabric/Forge
• FancyMenu
• FallingLeaves
• Farsight
• Fbp
• FpsReducer
• Googlyeyes
• InventoryEssentials
• Inventory HUD
• Inventory Sorter
• Item Zoom
• Item Borders
• Light Overlay
• Loadingscreens
• Mainmenu Scale
• Medieval Music
• Mod Menu
• Mouse Wheelie
• Moving Light Source
• Neat
• Not Enough Animations
• Oculus
• Out Of Sight
• Particle Culling
• Radium
• Radon
• Reforgium
• Replay Mod
• Rubidium
• Screenshot Browser
• Sound Filters
• TravelersTitles

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Generally

You can say that Client-side mods can be classified like mods that affect the “player-side”.
This includes Minimap Mods, some HUD modifiers, a mod that Improves the “computer-side” performance (such Optifine) and etc.

• They work if you only install them to your own game.

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How to install Client-side Mods

To install client-side mods on your computer is very simple.
Firstly you’ll need to Setup Forge in your computer.
You can find how to install Forge on here.
Note that instead of installing using the ” Install Server ” option, you’ll need to use the ” Install Client ” option. This should install Forge in your Minecraft launcher.

To install:

1. 
   

   Open Websites such as CurseForge and download all Mods you’d like.

   
   
2. 
   

   In your computer, open your Minecraft directory.
   
   If you’re using Windows, you can find your Minecraft folder on:
   
   C:Users<username>AppDataRoaming.minecraft
   
   If you’re using MAC, you can find your Minecraft folder on:
   
   /Users/<username>/Library/Application Support/minecraft

   
   
3. 
   

   On the directory ” /mods “, drag and drop your Minecraft Mods.

   
   
4. 
   

   Open your launcher and launch the game using the Forge you had installed.

   
   

As you can see on the example Screenshot above, it only affects the player-side gameplay.

This should be a simple explanation guide about Client-side mods.

Feel free to open a ticket in your Billing Area if you need.