A PDF is a container.
You have JSON-LD and want to catch broken JSON or unexpected @type values before relying on it.
Website & SEO
Check the JSON-LD without pretending it is magic.
Fetch schema from a public URL or paste JSON-LD directly and make sure the JSON parses and exposes recognisable @type values.
OR
2
Paste JSON-LDUse this when you already have the code and only want to check the JSON itself.
Free · no sign-up · public URLs only · nothing is added to an account.
Useful to know
Four things worth knowing.
Opening is not the same as correct.
Valid JSON-LD can still use unsupported, incomplete or misleading schema properties.
Check the changed pages.
After the JSON parses, compare the markup with the requirements for the specific schema or rich-result type you want.
Keep the source document.
Syntax validation is the first check, not the final approval.