Nicolas Bernier

Seamless schema automatically inserts Schema.org and Open Graph metadata inside the page header to improve SEO and social network display. The metadata is extracted by default from the blog content data such as the page title, the post excerpt, the thumbnail image but it can be completed for each blog post, page and attachment using the provided metadata editor for simple properties and even within the page’s HTML code for the more complex ones.
<h3>Configuration</h3>
Configure the default page type and metadata and for the homepage. By clicking Settings / Seamless Schema in the admin page. This is optional since WordPress’ values (page title, description and header image) are used by default. You can also set the Twitter username of your website for the Twitter site cards from here.
If you have Polylang installed, you can set per-language settings.
Authors can fill their Twitter username in their profile for the Twitter site cards.
<h3>How to use</h3>
When editing a blog post, a page or an attachment, you can set its Schema.org content type and metadata. In most cases, the content-type will be Article or Web Page but you can set a more accurate type such as Organization or Product Review.
You can add extra metadata and override the default ones such as the name, description (post excerpt) and image by selecting the property you want in the select box then click the + button. The properties that already have a default value show up in italic in the list. If you set an invalid property for the selected content type, the row will show up in red and won’t be used on the website.
The metadata is added in meta tags in the page header so it’s totally invisible. However, only canonical properties can be added. For more complex types such as home address and product review, you have to add manually the metadata in the HTML code of your post. Have a look at the Schema.org website for more information about the structure.
Additional OpenGraph and Twitter tags can be added in posts, pages and attachments as custom fields prefixed by <code>og_</code> or <code>twitter_</code>. For example, to add the tag <code>og:my_tag</code>, add a custom field named <code>og_og:my_tag</code> with the value you want.

Seamless Schema

Seamlessly insert schema.org and Open Graph microdata into WordPress.

Michael Dinerstein (Mission Mike)

About Scrape && Debug
Preview your posts and pages on social media. Validate your pages’ HTML with W3C’s Validator, or check PageSpeed with Google’s PageSpeed Insights. Access these tools quickly from within wp-admin, without needing to copy/paste multiple URLs each time to see your results. This utility can seriously speed up your publishing process, especially if you’re concerned with how your new posts appear on social media.
This plugin was created to speed up SEO and Social Media testing via public tools provided by Google, W3C, Facebook, and LinkedIn. Found in page/post sidebar metabox. Some services (like Facebook’s Sharing Debugger) require an account with the respective service to use (i.e., a free Facebook account).
Scrape and Debug does not allow you to change any meta titles, keywords, open graph data, etc. It is only providing quick-links to debug the existing data and values set for those fields by other 3rd-party SEO plugins, or to test your general page speed and HTML validity.
Links to quickly debug and check posts are found in the sidebar when editing posts, as well as in a column (Quicklinks) when listing posts or pages in admin.
In Settings, debuggers can be shown or hidden, or omitted from particular post types.
Watch this video to learn more:
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Scrape and Debug

Simplify page debugging via Facebook Sharing Debugger, LinkedIn Post Inspector, Google's Structured Data Testing Tool and Rich Results Test, Page …

Seamless Schema vs Scrape and Debug