Free Online Schema Markup Validator

Igor Verentsov

Schema Checker

Validate structured data on any page. Check JSON-LD, Microdata, Open Graph, and Twitter Cards against schema.org standards.

TL;DR:

Schema.org checker extracts all JSON-LD / Microdata / RDFa markup from a page, validates against schema.org spec, and shows which rich results can appear in SERP (FAQ, HowTo, Product, Article, Organization). Detects type errors and missing required fields.

Generate JSON-LD for any schema type Article / FAQ / HowTo / Product / Recipe / Event / BreadcrumbList / Organization / LocalBusiness / Speakable

Schema type

Generated JSON-LD

Paste this inside <head> wrapped in <script type="application/ld+json">…</script>. Validate via Google Rich Results Test before publishing.

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Structured DataSchema.org markup helps search engines understand content and display Rich Snippets in results.

JSON-LD / MicrodataWe check both markup formats: JSON-LD (recommended by Google) and embedded Microdata.

Rich SnippetsCorrect markup unlocks enhanced snippets: ratings, prices, FAQ, breadcrumbs.

Errors & WarningsInvalid markup does not appear in search. The tool finds critical schema errors.

Why teams trust us

JSON-LD

& Microdata

Rich

Google snippets

<2s

result

Schema

type validation

How it works

1

Enter page URL

2

JSON-LD & Microdata extracted

3

Errors & rich types shown

Schema.org checker: path to rich search results

Schema.org structured data is the language you use to communicate with search crawlers. Correct markup unlocks stars, prices, FAQ and other Rich Snippets that increase CTR by 20-40%.

Auto-detect schemas

Automatically detects all Schema types: Article, Product, FAQ, BreadcrumbList, Organization and others.

Field validation

Verifies required and recommended fields for each schema type according to Google specifications.

JSON-LD syntax

Parses and validates JSON-LD markup syntax — a missing comma makes the entire schema invalid.

Snippet preview

Shows how the page will appear in Google search with Rich Snippet markup in place.

Who uses this

SEO

rich snippets & markup

Developers

JSON-LD validation

Content managers

article & product markup

DevOps

post-deploy validation

Common Mistakes

Markup does not match visible contentGoogle penalizes mismatch: if JSON-LD rating is 5.0 but there are no visible reviews on the page, it's a violation.

Duplicate schemasMultiple Organization or WebSite blocks on one page cause a conflict. Use one block of each type.

Not updating schema after redesignAfter page restructuring, hardcoded values in JSON-LD may become outdated and inaccurate.

Using Microdata instead of JSON-LDGoogle recommends JSON-LD as the preferred format. Microdata is harder to maintain when HTML changes.

Best Practices

Start with types that have maximum CTR impactFAQ, HowTo, Product with reviews and ratings — these types give the greatest CTR boost in search.

Test in Google Rich Results TestAfter adding markup, verify the page in Google's official tool to confirm correctness.

Use dynamic schema generationGenerate JSON-LD from real database data — the schema is always current and requires no manual updates.

Monitor errors in Google Search ConsoleGSC shows structured data errors and warnings for every page of your site.

Get more with a free account

Schema.org check history and API keys for automated validation.

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Why Structured Data Matters

Structured data helps search engines understand your content and display rich snippets in search results. JSON-LD, Microdata, Open Graph, and Twitter Cards each serve a different purpose — from Google rich results to social media previews. Proper schema markup can improve click-through rates by up to 30%.

What We Check

JSON-LD — Google's recommended format for structured data. We parse and validate all JSON-LD blocks against schema.org vocabulary.
Microdata — HTML-embedded structured data using itemscope/itemprop attributes. Detected and validated automatically.
Open Graph — Meta tags for social media previews on Facebook, LinkedIn, Telegram and other platforms.
Twitter Cards — Meta tags for rich link previews on X (Twitter). Summary, large image, player and app card types.

Frequently Asked Questions

What is Schema.org markup?

Schema.org is semantic JSON-LD markup that helps search engines and LLMs understand page content: type, author, price, rating, FAQ. Correct markup unlocks rich results in Google and boosts CTR.

Which schema types does Google support for Rich Results?

Article, BreadcrumbList, FAQPage, HowTo, Product, Review, AggregateRating, Event, Recipe, VideoObject, SoftwareApplication, Organization, WebSite SearchAction, LocalBusiness and ~30 more. Full list at developers.google.com.

Related guides

Longer-form reading on this topic from the knowledge base.

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