A method and apparatus for reverse debugging source code using causal analysis is disclosed. The method comprises executing byte-code created from a plurality of lines of source code, wherein the plurality of lines of source code comprise at least one breakpoint; storing execution data after execution of each line of source code in the plurality of lines of source code until execution reaches the at least one breakpoint; performing a code execution analysis using the execution data and the plurality of lines of source code; receiving an input via a graphical user interface (GUI), wherein the input requests specific execution details based on the code execution analysis; and responding via the GUI to the input.