Install OptiFab in GDLauncher
OptiFab runs on Fabric. Pick whichever your existing instance uses, or create a new one. GDLauncher installs the correct loader automatically.
Install on Fabric
- Open GDLauncher and create a new instance (the + button on the Library page).
- Pick the Fabric loader and a Minecraft version that OptiFab supports (1.21.11, 1.20.4, 1.19.4 are common choices).
- Open the new instance, go to the Addons tab, and click Add Addons.
- Paste the Quick Install ID
#optifab, find OptiFab in the results, and hit Download. GDLauncher pulls dependencies automatically. - Hit Play. That's it.
Before you install
Make sure your Minecraft version matches what OptiFab supports. As of the latest release, 1.21.11, 1.20.4, 1.19.4 are supported. OptiFab only runs on Fabric; mods built for other loaders won't work. GDLauncher checks compatibility for you and won't install something incompatible with the instance you've chosen.
Frequently Asked Questions
Is OptiFab free?
Yes. OptiFab is free to download and install through GDLauncher. GDLauncher itself is also free and ad-free.
What Minecraft versions does OptiFab support?
OptiFab supports Minecraft 1.21.11, 1.20.4, 1.19.4. GDLauncher will automatically pick a compatible version when you install it.
Does OptiFab require Forge or Fabric?
OptiFab requires Fabric. GDLauncher will install the correct loader automatically when you create an instance.
How do I install OptiFab?
Open GDLauncher, go to your instance's Addons tab, click Add Addons, and paste the Quick Install ID #optifab. GDLauncher handles dependencies and the right Minecraft version automatically.
Who made OptiFab?
OptiFab is made by KiteJs. The full project lives on Modrinth (https://modrinth.com/modpack/optifab).
Need help?
Read our troubleshooting guide, check the guides section, or join the GDLauncher Discord community.