Jay Holtslander

<a href="https://wpvulndb.com/plugins/structured-data-test-button" rel="nofollow ugc"></a>
Adds a “Test Data” link in the admin bar (when viewing any page or post) which opens the current URL in <a href="https://search.google.com/structured-data/testing-tool" rel="nofollow ugc">Google’s Structured Data Testing Tool</a>. (You must have the admin bar enabled to see it.)
<h3>Introduction to Structured Data</h3>
Structured data markup describes things on the web, along with their properties. For example, if your site has recipes, you could use markup to describe properties for each recipe, such as the summary, the URL to a photo for the dish, and its overall rating from users.
When you provide structured data markup for your online content, you make that content eligible to appear in two categories of Google Search features:
<ul>
<li>Rich results — Structured data for things like recipes, articles, and videos can appear in Rich Cards, as either a single element or a list of items. Other kinds of structured data can enhance the appearance of your site in Search, such as with <a href="https://developers.google.com/search/docs/data-types/breadcrumbs" rel="nofollow ugc">Breadcrumbs</a>, or a <a href="https://developers.google.com/search/docs/data-types/sitelinks-searchbox" rel="nofollow ugc">Sitelinks Search Box</a>.</li>
<li>Knowledge Graph cards — If you’re the authority for certain content, Google can treat the structured data on your site as factual and import it into the <a href="http://www.google.com/intl/es419/insidesearch/features/search/knowledge.html" rel="nofollow ugc">Knowledge Graph</a>, where it can power prominent answers in Search and across Google properties. Knowledge Graph cards appear for authoritative data about <a href="https://developers.google.com/search/docs/data-types/corporate-contacts" rel="nofollow ugc">organizations</a>, and <a href="https://developers.google.com/search/docs/data-types/events" rel="nofollow ugc">events</a>. <a href="https://developers.google.com/search/docs/data-types/reviews" rel="nofollow ugc">Movie reviews</a>, and <a href="https://developers.google.com/search/docs/data-types/tv-movies" rel="nofollow ugc">movie/music play actions</a>, while based on ranking, can also appear in Knowledge Graph cards once they are reconciled to Knowledge Graph entities.</li>
</ul>
<a href="https://developers.google.com/search/docs/guides/intro-structured-data" rel="nofollow ugc">Learn more</a>

Structured Data Test Button

I made this plugin

Adds a “Test Data” link in the admin bar (when viewing any page or post) which opens the current URL in Google's Structured Data Testing Tool.

Abhik

A lightweight plugin to add Facebook Opengraph in the section of your blog. The Facebook Opengraph lets yor visitors share your content with proper Title, Description and Thumbnail Image.
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The Post Title as OpenGraph Title
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The first image uploaded/found in the post as the Facebook thumbnail. Ability to define default thumbnail if no image is found on the post.
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Custom Excerpt for the Facebook Share/Like description. Brings the first 25 words of the blog post if no custom excerpt is found.
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The Post URL as the Facebook Share/Like URL. Doesn’t matter if you have pretty permalinks on.
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Here is a live demo on my <a href="http://www.itsabhik.com/wordpress-opengraph-plugin/" rel="nofollow ugc">WordPress Opengraph Plugin</a> Homepage. If you find my plugins useful, add me in your circles on <a href="https://plus.google.com/106671843900352433725?rel=author" rel="nofollow ugc">Google +</a>. Don’t forget to check my blog <a href="http://www.itsabhik.com" rel="nofollow ugc">ItsAbhikDotCom</a>.
If you like the plugin, please vote a 5 Star. ===>>
Thanks

Opengraph and Microdata Generator

Adds Facebook OpenGraph Meta Tags to head for a better social sharing experience.

Structured Data Test Button vs Opengraph and Microdata Generator