io.github.pseudomuto:protoc-gen-doc
· This is a documentation generator plugin for the Google Protocol Buffers compiler (protoc). The plugin can generate HTML, JSON, DocBook, and Markdown documentation from comments in your .proto files.
Download JD-GUI to open JAR file and explore Java source code file (.class .java)
Click menu "File → Open File..." or just drag-and-drop the JAR file in the JD-GUI window protoc-gen-doc-1.5.1.jar file.
Once you open a JAR file, all the java classes in the JAR file will be displayed.
