Processing, visualization, and interpretation of marine magnetic survey data consistently challenges geophysical surveyors. A full-cycle magnetic survey starts with data acquisition via an integrated network or proprietary sensors and software programs. The format of data outputs can vary greatly, which proliferates variability across data processing workflows, visualization techniques, and final products. Typically, surveyors rely on numerous software programs and file formats to accomplish this task. MagTool offers a streamlined solution to bring marine magnetic survey data to a final result entirely within an ArcGIS environment. This system consists of a Python toolbox operated through ArcGIS Pro. It integrates functions from numerous Python libraries to execute an iterative and scalable data processing workflow. Outputs are quickly converted to feature classes in ArcGIS Pro and thereafter visualized through scripted geoprocessing tools. This system facilitates rapid data processing to support better field QA/QC of data and produces spatially derived descriptive statistics to quantify magnetic survey coverage after survey completion.