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These articles are static pages built from Markdown in the repository. They explain concepts and point to tools that run locally in your browser whenever the task allows. Browse by topic or search the full set.
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- Published: 2026-09-05
Writing robots.txt: User-agent groups, Allow/Disallow, and Sitemap tips
How robots.txt groups work, how Allow and Disallow interact, when Crawl-delay and Host matter, and practical Sitemap tips before you deploy.
Read article → - Published: 2026-09-05
Auditing sitemap.xml: urlset vs index, URL counts, and duplicate loc checks
How urlset and sitemapindex differ, what URL and loc counts mean, how to catch empty or duplicate locs, and a local pretty-print workflow before you deploy.
Read article → - Published: 2026-09-05
Open Graph and Twitter Card meta tags: what to put in <head>
Which basic SEO, Open Graph, and Twitter Card tags belong in your HTML head, how overrides and images work, and a local paste-ready workflow before you deploy.
Read article → - Published: 2026-09-05
FAQPage and Organization JSON-LD: fields Google expects and how to validate
How Schema.org FAQPage and Organization JSON-LD work in your page head, which fields matter for rich results, and a local draft-and-validate workflow before you ship.
Read article → - Published: 2026-09-05
Hreflang alternate links: reciprocal clusters, x-default, and BCP 47 codes
How hreflang alternate links tell search engines which language or region URL to show, why every page must list the full reciprocal cluster, when to use x-default, and how BCP 47 codes are written.
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