Why it exists
Structured data can be syntactically valid yet describe a page poorly: an article may be treated as a product, a service URL may point to the homepage, a breadcrumb trail may contain only one item, or a generator may invent missing values. SchemaCat aims to make the graph understandable and separate safe automatic improvements from data that genuinely does not exist.
Transparent analysis
We show where detected data came from and do not hide missing values.
Google + Yandex
Diagnostics and previews are separated by search engine.
No invented data
Improvements use only the existing JSON-LD and data available on the current page.
What the service does not promise
Valid Schema.org does not guarantee a rich result in Google or Yandex. Search engines decide independently what to display. The quality score shown by SchemaCat is an internal diagnostic metric, not an official search-engine score.