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Auth.js

Authentication for the Web.

Open Source. Full Stack. Own Your Data.

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Auth.js is a set of open-source packages that are built on standard Web APIs for authentication in modern applications with any framework on any platform in any JS runtime.

Need help? See authjs.dev for the documentation, or join our community on Discord  TypeScript .

Sponsored Looking for a hosted alternative? Use Clerk →

Features

Flexible and easy to use

  • Designed to work with any OAuth service, it supports 2.0+, OIDC
  • Built-in support for many popular sign-in services
  • Email/Passwordless authentication
  • Passkeys/WebAuthn support
  • Bring Your Database - or none! - stateless authentication with any backend (Active Directory, LDAP, etc.)
  • Runtime-agnostic, runs anywhere! (Docker, Node.js, Serverless, etc.)

Own your data

Auth.js can be used with or without a database.

Secure by default

  • Promotes the use of passwordless sign-in mechanisms
  • Designed to be secure by default and encourage best practices for safeguarding user data
  • Uses Cross-Site Request Forgery (CSRF) Tokens on POST routes (sign in, sign out)
  • Default cookie policy aims for the most restrictive policy appropriate for each cookie
  • When JSON Web Tokens are used, they are encrypted by default (JWE) with A256CBC-HS512
  • Features tab/window syncing and session polling to support short-lived sessions
  • Attempts to implement the latest guidance published by Open Web Application Security Project

Advanced configuration allows you to define your routines to handle controlling what accounts are allowed to sign in, for encoding and decoding JSON Web Tokens and to set custom cookie security policies and session properties, so you can control who can sign in and how often sessions have to be re-validated.

TypeScript

Auth.js libraries are written with type safety in mind. Check out the docs for more information.

Security

If you think you have found a vulnerability (or are not sure) in Auth.js or any of the related packages (i.e. Adapters), we ask you to read our Security Policy to reach out responsibly. Please do not open Pull Requests/Issues/Discussions before consulting with us.

Acknowledgments

Auth.js is made possible thanks to all of its contributors.

Sponsors

We have an OpenCollective for companies and individuals looking to contribute financially to the project!

Clerk Logo
Clerk
💵
FusionAuth Logo
FusionAuth
💵
Beyond Identity Logo
Beyond Identity
💵
Stytch Logo
Stytch
💵
Prisma Logo
Prisma
💵
Lowdefy Logo
Lowdefy
💵
Descope Logo
Descope
💵
Badass Courses Logo
Badass Courses
💵
Encore Logo
Encore
💵
Arcjet Logo
Arcjet
💵
Checkly Logo
Checkly
☁️
superblog Logo
superblog
☁️
Netlight logo
Netlight
☁️
Vercel Logo
Vercel
☁️
  • 💵 Financial Sponsor
  • ☁️ Infrastructure Support

Contributing

We're open to all community contributions! If you'd like to contribute in any way, please first read our Contributing Guide.

Note

The Auth.js/NextAuth.js project is not provided by, nor otherwise affiliated with Vercel Inc. or its subsidiaries. Any contributions to this project by individuals affiliated with Vercel are made in their personal capacity.

License

ISC