nextjs-seo

Comprehensive SEO guide for Next.js 16+ applications using App Router. Version: Updated for Next.js 16.1.3 (January 2026) Run this checklist for any Next.js project: - Check robots.txt : curl - Check sitemap : curl - Check metadata : View page source, search for and - Check JSON-LD : View page source, search for application/ld+json - Check Core Web Vitals : Run Lighthouse in Chrome DevTools - Metadata API : See references/metadata-api.md - Sitemap & Robots : See references/sitemap-robots.md - JSON-LD Structured Data : See references/json-ld.md - SEO Audit Checklist : See references/checklist.md - Troubleshooting : See references/troubleshooting.md - Mixing next-seo with Metadata API - Use only Metadata API in App Router - Missing canonical URLs - Always set alternates.canonical - Using CSR for SEO pages - Use SSG/SSR for indexable content - Blocking assets in robots.txt - Don't block CSS/JS needed for rendering - Missing metadataBase - Required for relative URLs in metadata - Viewport in metadata - Must be separate export in Next.js 14+ - Mixing metadata object and generateMetadata - Use one or the other, not both