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Schema Markup Validator

Paste your JSON-LD — or the whole page HTML — and see whether it is valid, which schema types it declares, and which required properties are missing. Runs entirely in your browser; nothing is uploaded.

100% in-browser — your markup never leaves the page. Checks structure and required properties, not live-page rich-result eligibility.

What it checks

  1. That your JSON-LD is valid JSON (the single most common failure).
  2. Which schema types are declared, including inside @graph and nested objects.
  3. The required and recommended properties for common types — Organization, Product, FAQPage, Article, BreadcrumbList, LocalBusiness and more.

For which schema types still earn visible results in 2026 — and which Google has retired — read the schema markup guide.

Part of the guide Schema markup: which types still produce results. More free tools and guides in the TapasSEO guides library.