> ## Documentation Index
> Fetch the complete documentation index at: https://docs.replit.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Web Apps

> Learn how to build full-stack web applications with Agent — responsive by default, instantly deployable, and shareable.

Web apps are the default output type on Replit. When you describe an idea to Agent, it builds a full-stack web application unless you specify a different artifact type.

## Getting started

There are two ways to create a web app:

* **Type a prompt**: Describe what you want to build on the Replit homepage. Agent automatically creates a web app.
* **Select from the dropdown**: Open the app type dropdown on the homepage and choose **Web app**, then describe your idea.

## Key features

* **Full-stack by default**: Every web app includes a frontend and backend. Agent sets up API routes, a database, and server-side logic as your app needs them.
* **Responsive design**: Apps adapt to different screen sizes automatically.
* **Instant deploy**: Publish your app with one click. Replit handles hosting, SSL, and infrastructure.
* **Shared infrastructure**: If your project has multiple artifacts — like a mobile app or data dashboard — they all share the same backend, database, and services.

## Use cases

* **SaaS products**: Build customer-facing tools, dashboards, and platforms.
* **Internal tools**: Create admin panels, CRMs, or workflow apps for your team.
* **Landing pages**: Launch marketing sites with forms, animations, and dynamic content.
* **Marketplaces and directories**: Build listing sites, job boards, or community platforms.

## Next steps

* Add a [mobile app](/replitai/building-mobile-apps) or [data visualization](/replitai/data-apps) to the [same project](/replitai/artifacts#multiple-artifacts-in-one-project)
* Customize your app's look with the [Visual Editor](/replitai/visual-editor)
* Connect external services through [Integrations](/replitai/integrations)