Do I need Fabric API as well as the Fabric Loader?

Yes, and this trips up a lot of people. The Fabric Loader is the base layer that gets installed through the installer. Fabric API is a separate mod (.jar file) that most mods depend on to work. You download Fabric API from Modrinth or CurseForge and drop it into your mods folder just like any other mod. If you skip it, most mods will crash or simply not load.

Can I run Fabric mods and Forge mods together?

No. Fabric and Forge are separate loaders and their mods are not compatible with each other. You can only have one loader active at a time per profile. If you want to run both, you'd need separate Minecraft profiles, each with its own loader and mod folder.

How do I update Fabric when a new Minecraft version comes out?

Just run the Fabric installer again, select the new Minecraft version, and install it. This creates a new profile without touching your existing one. You'll also need to update Fabric API and any mods you use to versions that support the new Minecraft release.

Where is the Minecraft mods folder?

On Windows, it's at %appdata%\.minecraft\mods. On Mac, look in ~/Library/Application Support/minecraft/mods. On Linux, it's ~/.minecraft/mods. If the mods folder doesn't exist yet, create it manually inside the .minecraft directory. Fabric has to be installed and working before mods placed in that folder will load.

Does Fabric work with modpacks from CurseForge or Modrinth?

Yes. Many modpacks on both platforms are built for Fabric. When you install a modpack through a launcher like Prism or the CurseForge app, the correct loader version is usually installed automatically. If you're installing a modpack manually, check which loader and version it targets before setting anything up.

Fabric for Minecraft - Download & Install Guide

Download Fabric for Minecraft from the official page

Fabric is a mod loader for Minecraft Java Edition. Mods can’t just sit in a folder and run on their own. They need something underneath them that knows how to inject custom code into the game. Fabric is that layer.

It’s become one of the most popular loaders around because it updates fast. When a new Minecraft version drops, Fabric usually has support within hours or a day or two. That makes it the go-to choice for running mods on recent releases and snapshots. Performance mods in particular tend to target Fabric first.

Supported Minecraft Versions

Fabric supports Minecraft Java Edition from 1.14 through the latest stable release and most active snapshots. It does not work with Minecraft Bedrock Edition, and nothing before 1.14 is supported.

Most mods being made right now target 1.20.x, 1.21.x, or newer. Before you install anything, check the version a mod actually supports. Running Fabric on the wrong Minecraft version is the single most common reason mods refuse to load.

How to Install Fabric

The official installer takes care of everything. You don’t need to edit any files or touch the game folder manually.

Before You Start

Minecraft Java Edition installed and launched at least once
Java 17 or newer (required for Minecraft 1.17 and up)
The official Minecraft Launcher, or an alternative like Prism Launcher

Install Steps

Get the installer. Head to the official page at fabricmc.net/use/installer/ and grab the installer for your operating system. Windows users get an .exe. Mac and Linux users download a .jar file.
Run the installer. On Windows, double-click the .exe. On Mac or Linux, open a terminal and run java -jar fabric-installer.jar from the folder where you downloaded it.
Pick your Minecraft version. Use the dropdown to select the exact version you want to mod. Leave “Create profile” checked so the installer sets up a launcher profile for you automatically.
Select the Loader version. Stick with the latest stable version unless a specific mod says otherwise.
Click Install. It only takes a few seconds. You’ll get a success message when it finishes.
Open the Minecraft Launcher and look for the Fabric profile in the version selector. Choose it and hit Play to confirm Fabric loads correctly before adding any mods.
Add Fabric API. Nearly every Fabric mod depends on Fabric API. It’s a separate download that goes in your .minecraft/mods folder as a .jar file. See our Fabric Loader page for details on finding and installing it. For a full walkthrough on getting mods into your game after this point, our Fabric Loader install guide covers the whole process.

Fabric vs Other Mod Loaders

You’ll probably run into Forge, NeoForge, and Quilt while looking around. Here’s how they compare:

Forge / NeoForge has been around much longer and has a huge back catalog of mods. If you want to run older modpacks or mods from a few years ago, you likely need Forge or NeoForge.
Quilt is a fork of Fabric and can run most Fabric mods with some exceptions. Check the Quilt installer page if a mod specifically recommends it.
Fabric is lighter, faster to update, and the better pick for performance mods and anything targeting recent Minecraft versions.

Mods are not cross-compatible between loaders. A Fabric mod won’t run on Forge. If you want visual performance improvements alongside Fabric, some players pair it with OptiFine, though Sodium (a Fabric mod itself) is now the more common choice for that.

Troubleshooting

If Fabric isn’t appearing in your launcher after installation:

Restart the launcher. It doesn’t always refresh automatically after the installer runs.
Run the installer as administrator on Windows. Right-click the .exe, choose “Run as administrator,” and reinstall.
Check your Java version. Minecraft 1.17+ requires Java 17 or higher. An outdated Java installation will cause the installer to fail or Fabric to not launch. Download a current version from Adoptium or java.com.
Launch vanilla Minecraft first. The installer needs the base game files to already be in place. If you’ve never opened the game, do that before running the Fabric installer.
Don’t mix up Fabric Loader and Fabric API. The loader is what you install through the installer. Fabric API is a separate .jar file that goes in your mods folder. Missing one of the two is extremely common and will cause most mods to crash on startup.

If mods crash after Fabric loads fine, the version is almost always the culprit. A mod built for 1.21.4 won’t work on 1.21.1, even though the numbers look similar. Match the mod version exactly to your Minecraft version.

Fabric for Minecraft – Download & Install Guide