Embed a Visio document
Embed a Visio document just like you can with Word Online.
This would allow us to embed our documents into other systems and services like I can do with Lucidchart. I would look to switch products if I could do this.
Chad Chamberlain commented
This may not address your situation, but you can embed one that's stored in SharePoint Online or Office 365. Find the Visio document, then open it in Visio Online, then do File-> Share and choose Embed, then copy the embed code wherever you'd like it displayed.