We no longer recommend using Visio Services (also called Visio Web Access) or the Visio Web Access Web Part with SharePoint Online. These features will be retired from Office 365 and SharePoint Online. We will stop Visio Services and stop supporting the Visio Web Access Web Part in September 2018.
Note In SharePoint Server, these features will be supported in accordance with the Microsoft Lifecycle Policy.
Use Visio Online from now on. Visio Online is your choice for future solutions in SharePoint Online. Visio Online is a new way to view, edit, and share Visio diagrams on the web. For more information, see View, create, and edit a diagram in Visio Online and Visio Online help.
Migrate Visio Services diagrams to Visio Online
Visio Online provides many improvements to Visio Services (also called Visio Web Access). The following sections provide detailed instructions for migrating Visio Services to Visio Online.
Insert a Visio Online diagram on a modern SharePoint page
There are two ways to do this.
Add a File viewer web part to a modern SharePoint page
Create a modern SharePoint page where you wish to insert the Visio diagram. For more information, see Add a page to a site.
Click , and then choose File viewer.
Browse to a Visio diagram that you wish to insert, and then choose Add Document.
For more information, see Using web parts on SharePoint Online pages.
Use the Embed command in Visio Online
Open the Visio diagram, select Open Diagram, and then select Edit in Browser.
Select File > Share > Embed.
In the Embed dialog box, copy the Embed code.
On a modern SharePoint page, add the Embed Code Web Part, and then add the embed code to it.
For more information, see Use the Embed web part on a modern page.