### **✨ Performant, customizable web apps in pure Python. Deploy in seconds. ✨**
[](https://badge.fury.io/py/reflex)
[](https://reflex.dev/docs/getting-started/introduction)
[](https://pepy.tech/projects/reflex)
[](https://discord.gg/T5WSbC2YtQ)
[](https://x.com/getreflex)
---
> [!NOTE]
> Build faster with Reflex:
>
> - **[AI Builder](https://build.reflex.dev/)** - Generate full-stack Reflex apps in seconds.
> - **[Agent Toolkit](https://reflex.dev/docs/ai/integrations/ai-onboarding/)** - Connect MCP and Skills to your coding assistant.
> - **[App Management](https://reflex.dev/hosting)** - Deploy and manage your Reflex apps.
---
# Introduction
Reflex is a library to build full-stack web apps in pure Python.
Key features:
- **Pure Python** - Write your app's frontend and backend all in Python, no need to learn Javascript.
- **Full Flexibility** - Reflex is easy to get started with, but can also scale to complex apps.
See our [architecture page](https://reflex.dev/blog/2024-03-21-reflex-architecture/#the-reflex-architecture) to learn how Reflex works under the hood.
## ⚙️ Installation
**Important:** We strongly recommend using a virtual environment to ensure the `reflex` command is available in your PATH.
## 🥳 Create your first app
Create a project, add Reflex, and start the development server with [uv](https://docs.astral.sh/uv/):
```shell
mkdir my_app_name
cd my_app_name
uv init
uv add reflex
uv run reflex init
uv run reflex run
```
You should see your app running at http://localhost:3000.
Now you can modify the source code in `my_app_name/my_app_name.py`. Reflex has fast refreshes so you can see your changes instantly when you save your code.
## 🫧 Example App
Build an image generation app in Python with Reflex: define the UI, manage state in a class, and call an image model from an event handler.
