Overview:

Auth.js is a set of open-source packages that provide authentication functionality for modern applications using any framework on any platform in any JS runtime. It offers a flexible and easy-to-use solution, designed to work with any OAuth service and support various sign-in methods. Auth.js can be used with or without a database and supports popular databases like MySQL, MariaDB, Postgres, Microsoft SQL Server, MongoDB, and SQLite. It prioritizes security by promoting passwordless sign-in mechanisms, using CSRF tokens and encrypted JSON Web Tokens. The libraries are written in TypeScript for added type safety.

Features:

Flexible and easy to use: Designed to work with any OAuth service, supports 2.0+ and OIDC.
Built-in support for many popular sign-in services: Includes support for popular sign-in services to streamline the authentication process.
Email/Passwordless authentication: Offers email-based authentication and passwordless sign-in methods.
Bring Your Database - or none!: Provides stateless authentication with support for various backend systems such as Active Directory and LDAP.
Runtime-agnostic, runs anywhere!: Compatible with multiple JS runtimes including Vercel Edge Functions, Node.js, and Serverless.
Own your data: Allows you to use Auth.js with or without a database, giving you control over your data. Offers built-in support for multiple databases.
Secure by default: Encourages best practices for safeguarding user data. Uses CSRF tokens, implements restrictive cookie policies, and encrypts JSON Web Tokens.
Features tab/window syncing and session polling: Supports short-lived sessions and aims to implement the latest security guidance.
Advanced configuration: Provides the ability to define custom routines for handling account sign-in, encoding and decoding JSON Web Tokens, and setting custom cookie security policies and session properties.
TypeScript: Auth.js libraries are written with type safety in mind, ensuring a robust and reliable authentication solution.

Nextauthjs

Adapters

Docs

Next Auth

Sveltekit Auth Example