Canonical URLs, robots.txt, sitemap optimization, metadata, Open Graph, JSON-LD, crawlability, rendering, and internal linking — practical references paired with free browser tools.
Each topic links to a practical guide and the matching free tool so you can check your own pages — no upload, no backend.
Consolidate duplicates correctly.
Open →Clean URLs, lastmod, HTTPS.
Open →Reliable social previews.
Open →Valid structured data.
Open →Useful page summaries.
Open →Static-first access.
Open →Strengthen the crawl graph.
Open →Everything together.
Open →Related: guides · technical SEO · AI search · integrations · tools · docs · WebmasterID.