Free Tool
Free Schema Markup Checker
Find JSON-LD structured data, parse schema types, catch invalid JSON-LD, and suggest next fixes.
What this tool checks
Run one URL scan and get a complete report.
- JSON-LD discovery
- Schema type detection
- Parse errors
- SEO/GEO fix suggestions
How it works
The scanner fetches the public page, follows a limited redirect chain, collects headers/resources/HTML, applies self-owned detection rules, checks SEO/security/accessibility/performance signals, and returns evidence-backed fixes.
Private IPs, localhost, file URLs, and internal hostnames are blocked to reduce SSRF and abuse risk.
Related tools