Systems and methods for debugging domain specific languages are provided. In accordance with an embodiment, one such system can comprise a web which includes a virtual machine, a debug execution machine, and a domain specific language (DSL)-specific tool interface. The web server is configured to compile DSL code received from a developer computer. During compilation the DSL code is instrumented to include debugging information received from the developer computer. The web server is also configured to execute, by the virtual machine, the instrumented code. During execution the instrumented code communicates with the debug execution machine such that a state of the debug execution machine mirrors a state of the virtual machine.