Features
Keycloak provides the following features:
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Single-Sign On and Single-Sign Out for browser applications.
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OpenID Connect support.
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OAuth 2.0 support.
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SAML support.
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Identity Brokering - Authenticate with external OpenID Connect or SAML Identity Providers.
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Social Login - Enable login with Google, GitHub, Facebook, Twitter, and other social networks.
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User Federation - Sync users from LDAP and Active Directory servers.
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Kerberos bridge - Automatically authenticate users that are logged-in to a Kerberos server.
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Admin Console for central management of users, roles, role mappings, clients and configuration.
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Account Management console that allows users to centrally manage their account.
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Theme support - Customize all user facing pages to integrate with your applications and branding.
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Two-factor Authentication - Support for TOTP/HOTP via Google Authenticator or FreeOTP.
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Login flows - optional user self-registration, recover password, verify email, require password update, etc.
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Session management - Admins and users themselves can view and manage user sessions.
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Token mappers - Map user attributes, roles, etc. how you want into tokens and statements.
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Not-before revocation policies per realm, application and user.
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CORS support - Client adapters have built-in support for CORS.
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Service Provider Interfaces (SPI) - A number of SPIs to enable customizing various aspects of the server. Authentication flows, user federation providers, protocol mappers and many more.
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Client adapters for JavaScript applications, WildFly, JBoss EAP, Tomcat, Jetty, Spring, etc.
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Supports any platform/language that has an OpenID Connect Relying Party library or SAML 2.0 Service Provider library.