How to open Javadoc JAR file in web browser Rename the file player-sdk-exo261-5.3.5-javadoc.jar to player-sdk-exo261-5.3.5-javadoc.zip Use your favourite unzip tool (WinRAR / WinZIP) to extract it, now you have a folder player-sdk-exo261-5.3.5-javadoc Double click index.html will open the index page on your default web browser. How to generate Javadoc from a source JAR? Running the command javadoc: javadoc --ignore-source-errors -encoding UTF-8 -sourcepath "player-sdk-exo261-5.3.5-sources.jar" -d "player-sdk-exo261-5.3.5-javadoc" -subpackages