Web Metadata Tools
Validate and preview site metadata
Paste an HTML <head> or full document to extract and inspect metadata — Open Graph, Twitter Cards, JSON-LD, canonical URL, and standard meta tags. See what's missing, preview social cards, and copy suggested fixes. Nothing leaves your browser.
Prototype
Client-side onlyAll processing happens locally — no data is sent anywhere.
HTML Input0 chars
Extracted Metadata
Open Graph
Twitter Card
JSON-LD
Social Preview (Approximate)
Metadata Checklist
Suggested Tags
Capabilities
Meta tag validation
Social preview
Structured data testing
Robots analysis
Local-First / Privacy
- All processing happens in your browser — nothing is uploaded
- No data is sent to third-party services
- No telemetry or usage tracking
- Your HTML never leaves your browser tab
