Auth.js

Auth.js is a complete authentication solution that works across different JavaScript frameworks. It provides everything needed to add secure login systems to websites and applications. You can let users sign in through their existing accounts on services like Google or GitHub, or you can use email-based magic links, or even traditional username and password combinations.

The library is runtime agnostic, meaning it adapts to work with Next.js, SvelteKit, Express, Qwik, and other frameworks. It handles session management, protects routes, and connects to databases when needed. Auth.js follows web standards and security best practices, making it both safe and reliable. Since it is open source, the code is publicly available for review and contributions from developers worldwide.

Getting started with Auth.js is straightforward for developers familiar with JavaScript frameworks:

• Install the Auth.js package for your specific framework using npm or yarn commands.

• Create an authentication configuration file where you define which login providers you want to use, such as Google, GitHub, or email.

• Set up environment variables to store sensitive information like client IDs and secrets from your chosen providers.

• Add the Auth.js route handlers to your application, which automatically creates all the necessary authentication endpoints.

• Protect specific pages or routes by checking the user session before allowing access.

• Use the built-in session management to display user information and handle sign-in and sign-out actions.

• Optionally connect a database adapter if you need to store user data, accounts, and sessions in your own database.

The documentation provides detailed setup guides for each supported framework with code examples.

• OAuth 2.0 and OpenID Connect support

• 80+ pre-configured authentication providers

• Magic link email authentication

• Username and password credentials

• WebAuthn passwordless login

• Multiple framework support (Next.js, SvelteKit, Express)

• Database adapters for major databases

• JWT or database sessions

• Built-in security features

• Custom page support

• TypeScript ready

• Open source and free