nextjs-auth
A custom authentication system built with Next.js 15, featuring session-based auth, user registration, and secure password handling.
Try the Live App →Why nextjs-auth?
A production-ready authentication layer designed for modern Next.js applications. Every component is purpose-built for security, performance, and developer experience — no black-box third-party providers required.
User Registration & Login
Complete authentication flow with email/password, built-in validation, and smooth UX.
Session Management
Server-side session handling with automatic expiration and secure cookie management.
Password Security
Bcrypt hashing for secure password storage, protecting user credentials at every step.
Built for Production
From database integration to route protection, every piece is optimized for real-world use. Type safety and validation ensure your auth layer is robust from day one.
Database Integration
PostgreSQL with Prisma ORM for type-safe queries and reliable data persistence.
Type Safety
Full TypeScript support with Zod validation — catch errors at compile time, not runtime.
Middleware Protection
Route protection for authenticated areas — guard pages with minimal configuration.
Tech Stack
Modern tools chosen for reliability and developer experience.
Next.js 15 & React 19
Frontend framework with server components and API routes
Server Actions & API Routes
Backend logic with Next.js server actions and route handlers
PostgreSQL & Prisma ORM
Reliable database with type-safe query builder
Custom Session-Based Auth
No external providers — full control over authentication
bcryptjs & Server Components
Secure password hashing with server-only execution
Zod Schema Validation
Runtime validation with static type inference
Project Structure
Clean, modular architecture that scales with your application.
Source Layout
src/
├── app/
│ ├── actions/auth.ts # Server actions for auth
│ ├── dashboard/page.tsx # Protected dashboard
│ ├── login/page.tsx # Login form
│ ├── register/page.tsx # Registration form
│ └── layout.tsx # Root layout
├── lib/
│ ├── db.ts # Prisma client
│ ├── session.ts # Session management
│ ├── password.ts # Password utilities
│ └── constants.ts # App constants
└── middleware.ts # Route protectionDatabase Schema
The application uses two main models to manage users and active sessions.
User
Stores user credentials and profile information with securely hashed passwords.
Session
Manages active user sessions with automatic expiration for security.
Getting Started
-
1
Configure environment — Copy
.env.exampleto.envand set your PostgreSQL connection string. -
2
Install dependencies — Run
npm installto install all required packages. -
3
Set up the database — Run
npm run db:pushto apply the Prisma schema to your database. -
4
Start developing — Run
npm run devto launch the development server.
/register to create an account and /login to sign in. Protected routes like /dashboard require authentication.
Ready to secure your app?
Get started with a custom authentication system built for modern Next.js applications.
Launch Demo →