---
title: README
emoji: 📊
colorFrom: pink
colorTo: green
sdk: static
pinned: false
---

<div style='text-align: center; margin-bottom: 1rem; display: flex; justify-content: center; align-items: center;'>
    <h1 style='color: white; margin: 0; font-size: 40px'>FastRTC</h1>
    <img src="https://huggingface.co/datasets/freddyaboulton/bucket/resolve/main/fastrtc_logo.png" 
         onerror="this.onerror=null; this.src='https://huggingface.co/datasets/freddyaboulton/bucket/resolve/main/fastrtc_logo.png';" 
         alt="FastRTC Logo" 
         style="height: 100px; margin-right: 10px;">
</div>

<div style="display: flex; flex-direction: row; justify-content: center">
<img style="display: block; padding-right: 5px; height: 20px;" alt="Static Badge" src="https://img.shields.io/pypi/v/fastrtc"> 
<a href="https://github.com/freddyaboulton/fastrtc" target="_blank"><img alt="Static Badge" src="https://img.shields.io/badge/github-white?logo=github&logoColor=black"></a>
</div>

<h3 style='text-align: center'>
The Real-Time Communication Library for Python. 
</h3>

Turn any python function into a real-time audio and video stream over WebRTC or WebSockets.

## Installation

```bash
pip install fastrtc
```

to use built-in pause detection (see [ReplyOnPause](https://fastrtc.org/)), and text to speech (see [Text To Speech](https://fastrtc.org/userguide/audio/#text-to-speech)), install the `vad` and `tts` extras:

```bash
pip install fastrtc[vad, tts]
```

## Key Features

- 🗣️ Automatic Voice Detection and Turn Taking built-in, only worry about the logic for responding to the user.
- 💻 Automatic UI - Use the `.ui.launch()` method to launch the webRTC-enabled built-in Gradio UI.
- 🔌 Automatic WebRTC Support - Use the `.mount(app)` method to mount the stream on a FastAPI app and get a webRTC endpoint for your own frontend! 
- ⚡️ Websocket Support - Use the `.mount(app)` method to mount the stream on a FastAPI app and get a websocket endpoint for your own frontend! 
- 📞 Automatic Telephone Support - Use the `fastphone()` method of the stream to launch the application and get a free temporary phone number!
- 🤖 Completely customizable backend - A `Stream` can easily be mounted on a FastAPI app so you can easily extend it to fit your production application. See the [Talk To Claude](https://huggingface.co/spaces/fastrtc/talk-to-claude) demo for an example on how to serve a custom JS frontend.

## Docs

[https://fastrtc.org](https://fastrtc.org)