draw.io with embedded plantuml saved as pdf with editable source embedded is a fantastic free alternative to Visio. Plantuml is excellent for some use cases, b

draw.io with embedded plantuml saved as pdf with editable source embedded is a fantastic free alternative to Visio. Plantuml is excellent for some use cases, but not all. They use kroki to enable embedded plantuml diagrams, you can save the whole thing as PDF than includes the source and can be edited in draw.io