Schema and JSON-LD checker

Find the errors in your structured data and get a ready block for the page.

From check to ready code

Paste a URL or your existing JSON-LD.

We show errors, gaps, and disputed properties.

Copy the corrected markup and add it to the HEAD.

Which markup to use for services, articles, and company pages.

What does the tool check+

JSON-LD syntax, Schema.org types, key properties, absolute URLs, and the main page signals.

Can I check a page that has no markup yet+

Yes. The tool builds a basic JSON-LD from the data it finds on the site.

Does markup guarantee a rich result+

No. Correct markup helps a search engine understand the page, but the decision to show a rich result belongs to the search engine.

Where do I put the generated JSON-LD+

Inside the page HEAD, or through your platform’s own field. On Tilda that is the extra HTML code in page settings.

The tool is open source under the MIT license: the page, the server check and the tests. You can deploy your own copy to Cloudflare Workers.