Paste JSON-LD or HTML and check syntax, graph items, duplicate @id values and common type fields.
Items-
Types-
Warnings-
This checker is for fast local inspection of structured data snippets before deeper validation. It can read raw JSON-LD or extract application/ld+json blocks from pasted HTML.
What the summary means
The output lists detected items and schema types, then reports missing @context, missing @type, duplicate @id values and common type-specific fields for pages, products, articles, software, FAQ, breadcrumbs, events and similar schema types.
Limits
This is not a full rich-result validator and does not fetch a live page. Use it to catch syntax and structure mistakes before running heavier checks.