# CheckMySchema

> A deterministic structured-data checker and educational reference for Schema.org and selected Google search features.

CheckMySchema extracts JSON-LD, Microdata and a limited RDFa subset. Checks cover a pinned Schema.org vocabulary and curated Google profiles. Merchant-listing checks are conditional on seller status. Scores describe evaluated markup, not search rankings or guaranteed eligibility. No AI model performs the validation.

The guides are original explanations with official references. CheckMySchema is independent of the search engines and Schema.org. The interactive checker requires human verification; it is not a public automation API.

## Documentation

- [The language behind your markup](https://checkmyschema.com/learn/schema-org-foundations/index.md): Types, properties and the difference between a vocabulary and a search feature.
- [Understand types, properties and inheritance](https://checkmyschema.com/learn/types-properties-inheritance/index.md): Why a Dentist can use properties inherited from both a place and an organization.
- [Connect your entities with JSON-LD](https://checkmyschema.com/learn/jsonld-graphs/index.md): Keep people, organizations, products and offers connected without duplication.
- [Valid markup is only the first step](https://checkmyschema.com/learn/google-rich-results/index.md): Separate vocabulary validity, feature requirements and actual search appearance.
- [Product snippets: name, price and proof](https://checkmyschema.com/learn/product-snippets/index.md): Understand the core product requirements and why merchant listings are different.
- [Build a breadcrumb trail that holds together](https://checkmyschema.com/learn/breadcrumb-markup/index.md): Ordered ListItems, meaningful names and the final-item exception.
- [Article markup without invented requirements](https://checkmyschema.com/learn/article-markup/index.md): Headline, images, dates and authors are recommendations in the core article guide.
- [How Bing reads structured data](https://checkmyschema.com/learn/bing-structured-data/index.md): Supported formats and the role of Bing’s own inspection tools.
- [Keep markup aligned with visible content](https://checkmyschema.com/learn/bing-content-quality/index.md): Accurate annotations matter more than adding every possible property.
- [Where Yahoo fits in your markup workflow](https://checkmyschema.com/learn/yahoo-search/index.md): Use Yahoo’s webmaster guidance and its documented connection to Bing.
- [Structured data beyond a single search index](https://checkmyschema.com/learn/duckduckgo-search/index.md): Why a mixed-source search engine needs careful expectations.
- [Yandex: vocabulary plus service requirements](https://checkmyschema.com/learn/yandex-markup/index.md): A separate validator and feature-specific interpretation of markup.
- [Why every check needs a rule version](https://checkmyschema.com/learn/versions-and-updates/index.md): Keep a reproducible vocabulary snapshot and a separately reviewed search ruleset.
- [Turn a report into a fix list](https://checkmyschema.com/learn/errors-warnings-and-notes/index.md): A practical order for working through your findings.
- [Check the details of a local business](https://checkmyschema.com/learn/local-business-checks/index.md): Validate business names, physical addresses and opening hours without inventing missing facts.
- [Product snippets versus merchant listings](https://checkmyschema.com/learn/merchant-listings/index.md): Understand why a review page and a shop need different Google checks.
- [Describe software without inventing reviews](https://checkmyschema.com/learn/software-app-markup/index.md): Separate accurate app markup from Google software rich-result requirements.
- [Resolve conflicting entity details](https://checkmyschema.com/learn/connected-entity-conflicts/index.md): Find disagreements across plugins and templates while keeping intentional multiple values.

## Reference

- [Official sources](https://checkmyschema.com/sources/index.md): Documentation and links used by the checker.
- [Checker](https://checkmyschema.com/): Interactive website inspection.
- [XML sitemap](https://checkmyschema.com/sitemap.xml): Public canonical pages.