---
title: "Minecraft Forge in Prism Launcher — Installation & Mod Setup"
description: "How to install and update Minecraft Forge (1.1 – 1.20.1+) in Prism Launcher on Windows. Core dependency: Built-in Forge API."
canonical: https://prismlauncher.ink/loaders/minecraft-forge
updated: 2026-10-17
---

# Minecraft Forge in Prism Launcher

The historic standard loader behind thousands of large content mods and classic CurseForge/FTB packs. Supports Minecraft 1.1 – 1.20.1+.

## Facts (2026-10-17)

- **Mod Loader:** Minecraft Forge
- **Minecraft Versions:** 1.1 – 1.20.1+
- **Core Dependency:** Built-in Forge API
- **Best For:** Classic and Golden-Age modpacks on 1.7.10, 1.12.2, 1.16.5, 1.18.2, and 1.20.1 (RLCraft, Pixelmon, ATM9)

## Installing Minecraft Forge in two clicks

The historic standard loader behind thousands of large content mods and classic CurseForge/FTB packs.

In Prism Launcher, you never need to download a separate loader installer JAR from a browser. Right-click your instance, select **Edit** → **Version**, and click **Install Minecraft** on the right-hand sidebar.

## Adding mods and dependencies

- **Core requirement:** Built-in Forge API. Open the **Mods** tab and click **Download mods** to grab dependencies from Modrinth or CurseForge.
- **Best use cases:** Classic and Golden-Age modpacks on 1.7.10, 1.12.2, 1.16.5, 1.18.2, and 1.20.1 (RLCraft, Pixelmon, ATM9).
- **Get the launcher:** Download the Windows installer or portable build at [/download](https://prismlauncher.ink/download).

## FAQ

### How do I update Minecraft Forge to a newer version in Prism Launcher?

Open Edit Instance → Version, select the loader row, and click **Change version** on the right sidebar to pick the latest build.

### Why did my Minecraft Forge instance exit with code 1?

Check that your Java version matches your Minecraft version (Java 21 for 1.20.5+, Java 17 for 1.18–1.20.4, Java 8 for 1.16.5 and older) under [Java Settings](https://prismlauncher.ink/java).

## Related

- [Prism Launcher Mod Loaders](https://prismlauncher.ink/loaders)
- [Complete Minecraft Java Version Chart (Java 8, Java 17 & Java 21)](https://prismlauncher.ink/java/which-java-version-for-each-minecraft-version)
- [Prism Launcher Modpacks & Mod Downloader](https://prismlauncher.ink/modpacks)
- [How to Fix Minecraft Exit Code 1 & Exit Code -1 in Prism Launcher](https://prismlauncher.ink/howto/fix-minecraft-exit-code-1-prism-launcher)
- [Fabric Loader in Prism Launcher](https://prismlauncher.ink/loaders/fabric-loader)

## Download

Free and open source: [Download Prism Launcher](https://prismlauncher.ink/download)

Markdown mirror: https://prismlauncher.ink/loaders/minecraft-forge.md