Tool · SEO Checker
Free on-page SEO checker
Sourcer scores the public HTML of one URL — weighted checks for indexing blockers, snippet fields, social previews, and structured data — then shows the source so you can verify every finding.
What you get
- Letter grade and 0–100 score with plain-language “why” for each check
- Title, description, H1, Open Graph, Twitter, JSON-LD / schema.org
- robots.txt and sitemap.xml reachability for the scanned host
- Full HTML source view and optional local save / shareable report link
When to use it
Use Sourcer when you need a quick mobile-friendly snapshot of one page. For multi-thousand-URL crawls, a desktop crawler is still the better fit — see our Screaming Frog comparison.