Next.js 16 Migration Tool

The safest, most comprehensive way to migrate from Next.js 14/15 to 16. Built for developers who value safety, reliability, and professional-grade tooling.

Install from npmView on GitHub

Quick Start

npx nextjs16-migrator

That's it. The tool will guide you through the entire migration process with interactive prompts, automatic backups, and detailed progress reporting.

Why Choose Our Migration Tool?

Safety First

Automatic git commits and file backups before any changes. One-command rollback if something goes wrong.

  • • Git commits before migration
  • • File-level backups
  • • Instant rollback capability

Interactive Experience

Step-by-step guided migration with clear explanations, progress indicators, and smart suggestions.

  • • Guided migration wizard
  • • Real-time progress updates
  • • Context-aware recommendations

Preview Changes

See exactly what will change before applying any transformations. No surprises, no broken code.

  • • Dry-run mode
  • • Detailed change preview
  • • File-by-file analysis

Comprehensive Analysis

Deep project analysis with compatibility checks, performance metrics, and detailed reporting.

  • • Compatibility validation
  • • Performance tracking
  • • Detailed migration reports

Enterprise Ready

Built for teams and organizations with CI/CD integration, batch processing, and professional support.

  • • GitHub Actions integration
  • • Batch processing
  • • Professional support

Superior to @next/codemod

While @next/codemod provides basic transformations, our tool offers enterprise-grade features.

  • • Automatic backups
  • • Interactive CLI
  • • Comprehensive documentation

How We Compare to @next/codemod

Featurenextjs16-migrator@next/codemod
Automatic Backups✓ Included✗ None
Rollback Capability✓ One command✗ Manual only
Interactive CLI✓ Guided wizard✗ Basic commands
Preview Mode✓ Dry-run available✗ No preview
Progress Indicators✓ Real-time updates✗ None
Performance Analysis✓ Built-in tracking✗ No analysis
Migration Reports✓ Detailed HTML reports✗ No reporting
CI/CD Integration✓ GitHub Actions ready✗ Manual process
Documentation✓ Comprehensive guides✗ Basic README
Professional Support✓ Available✗ Community only

What Gets Migrated

Core Transformations

  • • middleware.ts → proxy.ts: Automatic conversion with function renaming
  • • Cache API Updates: revalidateTag() with cacheLife profiles
  • • Async Parameters: params, searchParams, cookies(), headers()
  • • next/image Updates: Legacy image component replacements
  • • Configuration Updates: next.config.js optimizations

Compatibility Checks

  • • Node.js Version: Validates 20.9+ requirement
  • • Dependency Analysis: Checks for problematic packages
  • • AMP Detection: Identifies removed AMP usage
  • • Experimental Flags: Updates deprecated configurations
  • • Project Structure: Validates Next.js project format

Installation & Usage

Global Installation

npm install -g nextjs16-migrator

Install globally for use across all projects

nextjs16-migrator

Direct Usage

npx nextjs16-migrator

Use directly without installation

npx nextjs16-migrator analyze

Available Commands

Interactive Mode

nextjs16-migrator

Start the guided migration wizard

Analyze Project

nextjs16-migrator analyze

Check compatibility and show what will change

Preview Changes

nextjs16-migrator migrate --dry-run

See changes without applying them

Rollback

nextjs16-migrator rollback

Restore to previous state

Ready to Migrate to Next.js 16?

Join hundreds of developers who have safely migrated their projects using our professional-grade tool. Get started in minutes with automatic backups and comprehensive analysis.

Install NowGet Professional Help

Free to use • Open source • Professional support available