How to Edit a JAR File Online

Edit any JAR file in your browser — modify text files, replace assets, inspect class files, and export a modified JAR. No software to install.

What Is a JAR File?

How to Edit a JAR File (Step by Step)

What You Can Edit in a JAR File

Editing Class Files (Advanced)

Editing a JAR File on Different Systems

JAR File Editor: Common Use Cases

FAQ