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Sanic | Build fast. Run fast.

Sanic | Build fast. Run fast.

Docs Documentation

Sanic is a Python 3.6+ web server and web framework that's written to go fast. It allows the usage of the async/await syntax added in Python 3.5, which makes your code non-blocking and speedy.

Source code on GitHub | Help and discussion board.

The project is maintained by the community, for the community. Contributions are welcome!

The goal of the project is to provide a simple way to get up and running a highly performant HTTP server that is easy to build, to expand, and ultimately to scale.


pip3 install sanic

Sanic makes use of uvloop and ujson to help with performance. If you do not want to use those packages, simply add an environmental variable SANIC_NO_UVLOOP=true or SANIC_NO_UJSON=true at install time.

$ export SANIC_NO_UVLOOP=true
$ export SANIC_NO_UJSON=true
$ pip3 install --no-binary :all: sanic


If you are running on a clean install of Fedora 28 or above, please make sure you have the redhat-rpm-config package installed in case if you want to use sanic with ujson dependency.


Windows support is currently "experimental" and on a best-effort basis. Multiple workers are also not currently supported on Windows (see Issue #1517), but setting workers=1 should launch the server successfully.

Hello World Example

from sanic import Sanic
from sanic.response import json

app = Sanic()

async def test(request):
    return json({'hello': 'world'})

if __name__ == '__main__':'', port=8000)

Sanic can now be easily run using python3

[2018-12-30 11:37:41 +0200] [13564] [INFO] Goin' Fast @
[2018-12-30 11:37:41 +0200] [13564] [INFO] Starting worker [13564]

And, we can verify it is working: curl localhost:8000 -i

HTTP/1.1 200 OK
Connection: keep-alive
Keep-Alive: 5
Content-Length: 17
Content-Type: application/json


Now, let's go build something fast!


Documentation on Readthedocs.


Release Changelogs.

Questions and Discussion

Ask a question or join the conversation.


We are always happy to have new contributions. We have marked issues good for anyone looking to get started, and welcome questions on the forums. Please take a look at our Contribution guidelines.

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