# (howto) Run a WDL script via Cromwell on a local machine (e.g. your laptop)Tutorials | Created 2015-12-21 | Last updated 2017-09-30

Running on a local machine is the simplest thing in the world. Assuming that you have a WDL script that you've validated called myWorkflow.wdl, and a JSON file of inputs called myWorkflow_inputs.json, you just call Cromwell’s run function, like so:
java -jar Cromwell.jar run myWorkflow.wdl --inputs myWorkflow_inputs.json
Note that any messages that are normally output to the terminal by the tools themselves will not actually be shown in the terminal where you're running the script. Instead, Cromwell saves this output in a log file called stderr located within the execution folder.