Publish on the web (Heroku) from the terminal

We recommend using Heroku to get your prototype online. It’s simple and fast to deploy new versions as you work.

Once your prototype is on Heroku, other people will be able to access and try your prototype from their own computers or mobile devices.

DO NOT enter real user data in to prototypes hosted on Heroku. If your prototype stores or collects user data, talk to a security professional about appropriate security steps you must take.

A prototype deployed on Heroku is called an app - it will have a url like:

You can have multiple apps running on Heroku - projects often have several so they can try different ideas out at once.

1) Set up Git

You need to set up Git on your prototype before you can use Heroku.

2) Sign up to Heroku

If you’re new to Heroku, sign up for a free account. When asked what language you use, select node.js.

3) Install the Heroku toolbelt

Install the Heroku toolbelt.

On Windows, after downloading the toolbelt you'll need to run heroku login using the cmd app, as it does not work in Git Bash. Once you’ve logged in, you can return to using Git Bash.

The toolbelt lets you use Heroku through the terminal. You will need to restart the terminal after installing the toolbelt.

4) Choose a name for your app

Think of a name for your app. You need to choose a name that’s unique. The name is used in the url for your prototype. For example the name:


will create an app at:

5) Create a Heroku app

In the terminal, go to the folder of your prototype and run:

heroku apps:create [name of your app] --region eu

Replace [name of your app] with your app name from step 4.

6) Set a password

Prototypes made with the kit require a password when published online. This stops members of the public coming across your prototype by accident.

To set a password, run:

heroku config:set PASSWORD=password_here

If you get an error about username, run:

heroku config:set USERNAME=username_here

7) Deploy your work

Make sure any changes you've made to your prototype have been committed to git.

From your prototype folder:

git push heroku main

This will push your work to Heroku. Deploying may take a minute or so.

In this example, main is the name of the default branch for the repo. So you may need to run the command with your own default branch name instead of main.

8) View your prototype on the web

After your work is deployed, you will be able to view it on the web by visiting [name] You can run heroku open to open your prototype in a browser.

Heroku puts apps to sleep that haven’t been accessed in a while - so if you’ve not visited your prototype for a while it may take a few seconds to open.