The safest and most reliable way to get the tool is directly from its official repositories.

Since dex2jar is a Java-based tool, you must have Java installed on your Windows machine.

Search for "Edit the system environment variables" in your Start menu, click , find Path under System Variables, and add your folder path.

Dex2jar does not have a traditional "installer." It is a portable command-line tool.

For the most up-to-date versions (like v2.4), visit the pxb1988/dex2jar GitHub Releases page.