Schema Markup Detector for JSON-LD Inspection

Detect structured data on a page and inspect the JSON-LD types, parsed properties, raw markup, and syntax issues that may need attention. Use the detected output to confirm which schema types are actually present, whether the markup can be parsed, and whether the structured data reflects the visible page content. A successful parse only confirms that the markup is readable, so review the meaning and accuracy of each property separately before relying on it for implementation or debugging.