Architecture Migration

Migrate NextAuth.js v4 to v5 Automatically

Upload your project and get production-ready migrated code in minutes.

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What changes between NextAuth.js v4 and Auth.js v5?

  • Package rename from next-auth to @auth/nextjs (or @auth/core for framework-agnostic usage)
  • Configuration moves from pages/api/auth/[...nextauth].ts to auth.ts root file with exported handlers
  • Universal auth() function replaces getServerSession, getSession, and useSession in Server Components
  • Middleware-based auth uses auth as middleware wrapper instead of withAuth from next-auth/middleware
  • Adapter packages renamed from @next-auth/* to @auth/*-adapter
  • Edge-compatible by default; database sessions work on Edge with proper adapter configuration
  • OAuth provider configuration simplified; many providers work with just clientId and clientSecret
  • Callbacks and events API restructured with new session strategy options

How Nivo migrates NextAuth.js v4 to Auth.js v5

01

Connect your project

Paste a GitHub URL or upload a ZIP file of your NextAuth.js v4 project.

02

Nivo detects your NextAuth.js v4 project

The engine scans your codebase to identify NextAuth.js v4 patterns, APIs, and configuration that need updating.

03

AI applies all Auth.js v5 migration transforms

Hybrid AST + AI engine applies deterministic transforms for configuration and dependencies, and AI-powered transforms for complex code changes. Every change gets a confidence score.

04

Download migrated codebase + review report

Get a ZIP with your fully migrated code, a complete migration report, and a checklist of items flagged for manual review.

Frequently Asked Questions

What is the biggest change from NextAuth v4 to v5?

The most impactful change is the universal auth() function that replaces getServerSession, getSession, and useSession. This single function works in Server Components, Route Handlers, middleware, and client components, simplifying auth access patterns significantly.

Is the NextAuth v4 to v5 migration safe?

Yes. Nivo updates all import paths, converts session access patterns to the new auth() function, updates adapter package names, and restructures your auth configuration file. Each change produces a reviewable diff.

How long does the migration take?

Most projects complete in under 10 minutes. The migration primarily involves import path changes, auth configuration restructuring, and session access pattern updates across your codebase.

Do I need to update my database?

The database schema for Auth.js v5 is largely compatible with NextAuth v4. Some adapters have minor schema changes for new features. Nivo flags any required database migrations based on your adapter choice.

Will my OAuth providers still work?

Yes. Most providers are simplified in v5—many now only need clientId and clientSecret. Nivo updates your provider configuration to the v5 format and removes unnecessary options that are now defaults.

Start your NextAuth.js v4 to Auth.js v5 migration

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