Amphibian SEO – A Next.js App Router-first SEO Toolkit

This content originally appeared on DEV Community and was authored by u/Horror_Amphibian7516

When working with the new Next.js App Router, I noticed most existing SEO libraries (like next-seo) were designed for the old Pages Router. They still work, but often feel like workarounds instead of being fully aligned with generateMetadata and static rendering.

That’s why I built amphibian-seo — a modern, App Router-first SEO toolkit that integrates seamlessly into the new Next.js architecture.

Why use Amphibian SEO instead of other libraries?

• Built for App Router – Native support for generateMetadata, no wrappers or hacks.
• Full SEO coverage – Titles, descriptions, OpenGraph, Twitter Cards, robots directives, canonical URLs, JSON-LD, preload assets, and more.
• TypeScript-first – Complete typings for all metadata options, helping you avoid mistakes.
• Dynamic templates – Title patterns like %title% | %siteName% for consistent branding.
• Security & performance – Add security meta tags and preload critical assets with ease.
• SSR and static ready – Designed to work with Next.js’s static and server rendering out of the box.

If you’re moving to or already using the App Router, this package is a better fit than older SEO libraries that were never designed for it.

Quick Example

// app/layout.tsx
import { Metadata } from 'amphibian-seo';

export function generateMetadata() {
  return Metadata({
    title: {
      default: 'My Site',
      template: '%title% | My Site',
    },
    description: 'A modern SEO setup for Next.js App Router',
    canonicalUrl: 'https://mysite.com',
    openGraph: {
      title: 'My Site',
      type: 'website',
      url: 'https://mysite.com',
      images: [
        { url: 'https://mysite.com/og.png', width: 1200, height: 630 },
      ],
    },
    twitter: {
      card: 'summary_large_image',
      site: '@mysite',
    },
  });
}

npm: amphibian-seo

If you’re already using the App Router, give it a try and let me know your thoughts — contributions and feedback are more than welcome.

This content originally appeared on DEV Community and was authored by u/Horror_Amphibian7516