A file with a .drawio extension is a drawing file created with diagrams.net’s draw.io that is an open-source program for working with diagrams. It contains overall information for the content and formatting of the diagram elements such as text, images, layout, shapes and positioning. Diagrams supported by DRAWIO include flowcharts, organization charts, maps, engineering elements, process diagrams, charts and more. DRAWIO files can be exported to several different formats such as JPG, PNG, BMP, XML, PDF, HTML and VSDX.
DRAWIO File Format
DRAWIO files are vector image files, stored in the standard XML file format. Developed by diagrams.net, it provides the capability to store diagrams information similar to Microsoft Visio. DrawIO is available as online app to create, open and export diagrams to various formats. The app is based on the mxGraph diagramming library that provides interactive graph and charting applications that run in any major browser such as Chrome, Firefox, Edge and Safari.
The following example is a simple flowchart created with the DRAWIO app.
The output XML generated with the export is as shown below.