Technical SEO Checklist for Next.js and Modern Web Apps

Building Fast, Crawlable Next.js Applications

Modern JavaScript frameworks provide incredible developer ergonomics, but without careful technical architecture, client-heavy apps can suffer from indexing delays and poor Core Web Vitals.

1. Server-Side Rendering (SSR) & Server Components

Relying purely on client-side rendering (CSR) means search engine bots must execute JavaScript in a secondary rendering pass. By leveraging Next.js React Server Components (RSC):

2. Automated Metadata and Open Graph Generation

Next.js provides native metadata export capabilities:

export async function generateMetadata({ params }): Promise<Metadata> {
  const article = await getArticle(params.slug);
  return {
    title: article.title,
    description: article.description,
    openGraph: {
      title: article.title,
      description: article.description,
      images: [article.coverImage],
    },
  };
}

3. Image Optimization and Cumulative Layout Shift (CLS)

Always use `next/image` with explicit `width` and `height` or `fill` with appropriate aspect ratio wrappers to prevent layout shifts.