These are highly technical and usually don't provide a "Save as .mq4" button. They are research tools for developers interested in how the MT4 virtual machine handles execution. 3. The Big Warning: "Scam-ware" on GitHub
Decompiling software you didn’t write usually violates the of the product. If you are trying to recover your own lost source code, you are on safer ground. However, using a decompiler to bypass licensing on a commercial EA is illegal in many jurisdictions and unethical in the developer community. Better Alternatives
The repository ex4-decompiler (Python-based) was selected for in-depth analysis.