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A simple way to demo Flask apps from your machine.

Project description


PyPI version

A simple way to demo Flask apps from your machine. Makes your Flask apps running on localhost available over the internet via the excellent ngrok tool.


Python 3.6+ is required.


pip install flask-ngrok

Inside Jupyter / Colab Notebooks

Notebooks have an issue with newer versions of Flask, so force an older version if working in these environments.

!pip install flask==0.12.2


  1. Import with from flask_ngrok import run_with_ngrok
  2. Add run_with_ngrok(app) to make your Flask app available upon running
from flask import Flask
from flask_ngrok import run_with_ngrok

app = Flask(__name__)
run_with_ngrok(app)  # Start ngrok when app is run

def hello():
    return "Hello World!"

if __name__ == '__main__':

Running the example:

 * Running on (Press CTRL+C to quit)
 * Running on http://<random-address>
 * Traffic stats available on 

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