Select your exact Minecraft Java version at files.minecraftforge.net and download the Installer from that version’s page. Forge 1.20 and 1.20.1 are separate targets.
Official Forge download
Open Minecraft Forge downloads ↗Choose the Minecraft version in the left version list. For example, the official 1.20 page is below. Do not download an EXE from a mirror claiming to be Forge.
Forge for Minecraft 1.20 ↗Install on Windows or Mac
- Launch the matching vanilla Java Edition once and close it.
- Download the Forge Installer JAR for the same game version.
- Open the JAR with a compatible Java runtime and select Install client.
- In Minecraft Launcher, choose the new Forge installation and run it once.
Add your first mod
- Download a mod whose page explicitly lists the same Minecraft and Forge version.
- Place its JAR in the mods directory for the Forge game profile.
- Launch and check the Mods menu; add one mod first before adding a full pack.
Java and version mismatch
If the installer will not run, confirm the Java runtime required by that Minecraft/Forge combination. If the game crashes, compare the mod’s loader and game versions, then read the newest crash log. A Fabric-only mod will not load in Forge.
Common questions
Can Forge 1.20.1 load a 1.20-only mod?
Only if that mod explicitly supports both versions; do not assume compatibility.
Is Forge part of the official Minecraft launcher?
It adds a separate Java launcher installation after you run its installer.
Sources and review
Reviewed 12 October 2026. Primary reference. Confirm live codes, prices, patch notes and account rules before publication.