SmartDraw has the industry-leading import for both Visio files and Visio stencils. No other diagramming program will convert files as accurately as SmartDraw.
Even the most complex shapes and diagrams will import reliably as fully editable SmartDraw diagrams and shapes.
You'll be able to continue to edit the imported diagram: add shapes, change shapes, and more.
If you need to share your files with existing Visio users, you can easily export any diagram as a Visio file.