Google updated validation tool of microdata
Google updated the structured data testing tool. Google adding to tool previews. Now webmasters will be able to immediately see how the template will look like in search results.
New functionality is not working for all types of schemes. Currently, only the markup for product pages and recipes.
To see preview, click on the specific type of markup in results checker:
If preview is available, you will see the PREVIEW button:
The new functionality is primarily intended to check the template of the mobile pages and includes preview AMP:
When you click on View all will show more detailed preview:
Below is an example of the marking:
A few years ago, Google had a separate tool for previewing extended snippets, but at the moment it is disabled.