# Custom Identity Management

Build custom login experiences for apps while seamlessly integrating with industry standards such as OAuth2, OIDC, and SAML, using APIs, SDKs, and plugins.

## Login Pages Look And Feel

Ensure your authentication system seamlessly matches your application's design. Choose from prebuilt customizable themes or fully customize your login pages using your own CSS, HTML, and JavaScript. You'll have the flexibility to create a cohesive user experience.

## Registration Form Fields

Self-service registration lets users sign up anytime, anywhere with custom forms that gather essential data. Validation rules ensure data accuracy, can call APIs, and prevent unauthorized registrations.

- Basic and advanced self-service registration.
- Customizable admin UI forms.

## Customize Emails & Messages

Customize emails and text messages for every workflow based on user profiles, tenant settings, and more. Manage messages using the admin UI, APIs, SDKs, or the CLI to ensure personalized and effective messaging.

[learn more](/content/docs/apis/message-templates/index.html)

## Localize All The Things

FusionAuth is built from the ground up to support localization. Every user-facing interface can be translated. Customize web pages, emails, and messages to match user preferences. Allow users to select their preferred language during registration or via profile management, providing a personalized and inclusive experience.

## Integrate With Webhooks

Push data to other systems using webhooks, including support for over thirty events. One unique feature of our webhooks is that they can also influence the originating operation, allowing you to write custom logic to control user logins, registrations, and more.

## Build Your Own Flows With APIs

Our well-documented and stable APIs help you build your own experience when you want to customize a workflow. Leave secure profile data storage to us, while you focus on your own unique user experience and logic flows.

[Using the API Directly](/content/docs/apis/login/index.html)

## Complete Auth for Any App

FusionAuth is a complete solution with no sacrifices. We got this. Go build something awesome.