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next-page-to-app-converter

v1.1.0

Published

Convert Next.js Pages Router to App Router

Vulnerabilities

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Links

Git

Maintainers

gauravprajapatidevgauravprajapatidev

Keywords

nextjsnext.jsnextjs-app-routernextjs-pages-routernextjs-migrationapp-routerpages-routerreactreact-server-componentsuse-clientclinode-clicodemodcode-modasttypescriptbabeldeveloper-toolsfrontendweb

Readme

Next.js Pages to App Router Converter

Automate your migration from Next.js Pages Router to App Router with intelligent component analysis and code transformation.

⭐ If this project saves you time, consider starring the repository and supporting its continued development.

🚀 Key Features

  • Smart Component Analysis: Automatically determines if a component should be Server or Client based on hooks and browser API usage.
  • Data Fetching Migration: Converts getServerSideProps and getStaticProps to async Server Components, including generateStaticParams.
  • Routing Updates: Transforms next/router to next/navigation (useRouter, usePathname, useSearchParams).
  • API Routes: Migrates API handlers to Route Handlers, updating res methods to NextResponse.
  • Metadata: Converts <Head> tags to the Metadata API.
  • Layouts & Providers: Automatically generates root layouts, nested layouts, and extracts context providers from _app.tsx.
  • Font Optimization: Migrates next/font configurations.

📦 Installation & Usage

Quick Run

Run directly using npx:

npx next-page-to-app-converter <project-path>

Global Installation

npm install -g next-page-to-app-converter
next-pages-to-app <project-path>

⚙️ Options

| Flag | Description | |------|-------------| | -d, --dry-run | Preview the migration without writing any files. | | -v, --validate | (Experimental) Runs runtime validation using Next.js DevTools (Requires Next.js 16+). | | -h, --help | Show all available commands and options. |

🛠️ How It Works

  1. Scans your pages directory for:

    • Routes
    • API endpoints
    • Special files (_app, _document, _error)

  2. Analyzes every component and its imports to detect:

    • React Hooks (useState, useEffect, etc.)
    • Event handlers (onClick, onChange, etc.)
    • Browser-only APIs (window, document, localStorage, etc.)

  3. Transforms your code by:

    • Adding "use client" directives where required.
    • Rewriting data fetching to async Server Components.
    • Updating navigation and routing logic.
    • Converting metadata handling.
    • Migrating API routes.

  4. Generates a complete app directory while preserving your application's behavior as closely as possible.

✅ Requirements

  • Node.js: 18.0.0 or later
  • Target Project: Next.js 13 or later
  • Validation: Next.js 16+ required for the --validate option

❓ Troubleshooting

Validation Issues

The --validate flag starts your development server for runtime validation.

Before using it, make sure the following command runs successfully:

npm run dev

Complex Projects

While the converter handles most common migration patterns, projects using:

  • Complex custom server logic
  • Dynamic runtime imports
  • Advanced webpack customization
  • Unusual routing patterns

may require manual review after migration.

❤️ Support

If this tool saves you hours of migration work, consider supporting its development.

Your support helps fund:

  • 🚀 New migration features
  • 🐞 Bug fixes
  • ⚡ Performance improvements
  • 📚 Better documentation
  • ❤️ Continued maintenance

Every contribution is greatly appreciated.

📄 License

ISC

🙏 Acknowledgments

  • Built with ts-morph for TypeScript AST manipulation.
  • Inspired by the Next.js community's migration needs.
  • Thanks to everyone who reports bugs, contributes code, and supports the project.