Quick inspection of JAR files without setting up a full development environment.
Below is a guide to the most popular JAR decompilers available for download, ranging from simple standalone tools to advanced reverse-engineering suites. JD-GUI (Java Decompiler GUI) jar decompiler download
Available for Windows, macOS, and Linux at the Official JD-GUI Page. Bytecode Viewer (The All-in-One Suite) Quick inspection of JAR files without setting up