How to Install and Run Minecraft Mod JARs (Java Edition)

Where to put JAR files in Minecraft: install mod JARs into the mods folder, run a server with java -jar, and launch the game. Covers Forge, Fabric, NeoForge and common errors.

Running the Minecraft Game (Client)

Installing and Running Mod JARs

Running a Minecraft Server JAR

Inspecting a Mod JAR Before Installing

Common Errors

Summary