Free tool
Schema Markup Checker
Run the schema markup checker
Free, no sign-up. You get the full LaunchSafer report, including the checks below, in 30–90 seconds.
Why invalid JSON-LD is a silent problem
A single missing comma or stray quote makes a JSON-LD block invalid, and search engines then ignore the whole block. Nothing looks wrong on the page, so it can go unnoticed for months.
LaunchSafer parses every JSON-LD block on the scanned pages and reports how many failed to parse, alongside the types that were read successfully (for example Organization, Product, Article, FAQPage or LocalBusiness).
Which schema types to use
Use the types that describe what the page really is: Organization or LocalBusiness on the homepage, Product with Offer on product pages, Article or BlogPosting on posts, and FAQPage only where the questions and answers are visible on the page.
LaunchSafer also detects your website type and checks for the structured data that type usually needs, such as Product schema on stores or Course schema on education sites.
Frequently asked questions
Is this a schema markup validator?
Partly. It validates that JSON-LD parses and lists the types found across your site. Use Google's Rich Results Test to check the required properties for a specific rich result.
Does it read microdata as well as JSON-LD?
Yes. It reports schema.org types from both JSON-LD and microdata (itemtype attributes).
How many pages does it check?
Up to 10 important pages per scan, starting from the address you enter.