How to Open an .mrpack File (and Get the Mod JARs Out)

An .mrpack is a Modrinth modpack: a ZIP with a mod list, not the mods themselves. How to open one, read the mod list, download every JAR and check it.

What Is Inside an .mrpack

Option 1: Look Inside the Pack Online

Option 2: Install It Through a Launcher

Option 3: Get Every Mod JAR from the Command Line

Check the JARs Before You Run Them

Summary