Edit .class Files in the Browser (No Recompile)

Edit Java .class files directly in jar.tools — change strings, numbers, booleans, and constants without decompiling, recompiling, or installing anything.

What "Tweak Constants" Edits

Step 1: Open the JAR

Step 2: Open Tweak Constants

Step 3: Edit a Value

Step 4: Export the Modified JAR

What This Approach Can't Do

Common Real Edits

If the JAR Is Signed

Summary