How to Edit .class Files in a Minecraft Mod

Learn how to view, decompile, and edit compiled .class files inside a Minecraft mod JAR — using an online tool, no local setup needed.

What Is a .class File in a Minecraft Mod?

Step-by-Step: View and Decompile a .class File

Decompile the Entire Mod at Once

Limitations of Class File Editing

Minecraft Class File Editor: What to Use

FAQ