Analyze keyword and phrase frequency/density in your content.
Generate SEO, Open Graph, and Twitter Card meta tags for any page.
Build a robots.txt with per-bot rules, crawl delay, and sitemap reference.
Build, bulk-import, and validate sitemap.xml files with lastmod, changefreq, and priority.
Turn any title into a clean, URL-safe slug with correct Vietnamese diacritic handling.
Paste some text to see keyword density.