Simple Deployment

Launch a Linux Virtual Machine on your preferred cloud service.

If you are not a superuser, become one.

Update your machine and install pip3:

apt update
apt install python3-pip

Follow the getting started instructions. This will prepare your VM to run your JustPY program.

Then, set the HOST parameter in the configuration file justpy.env to the public IP address of the VM or to '' (one should work). If you want to use the default port, set the PORT parameter to 80 (otherwise port 8000 will be used). In some cloud services only port 80 is supported by default. In some cloud services, if you are not logged in as root by default, you will need to run the program with sudo.

For example you may add the following two lines to justpy.env:

HOST = ''
PORT = 80

Alternatively, you can use the host and port parameter in the justpy command.

Now, point your browser to your VM using the IP address and port and you should be good to go. If your VM is assigned a domain name, you can use that.

More Complex Deployment

For more complex deployments please look at the uvicorn deployment instructions.

Make sure to set the start_server keyword argument of the justpy command toFalse, so that uvicorn server is not started.

You also need to expose the starlette app to unvicorn. If is your main program file where you import justpy then you need to add the following line to it after importing justpy:

import justpy as jp
app =


The JustPy configuration file is not applicable in this case. You will need to specify the required configuration in the command line or in the Gunicorn configuration file.