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Create Cozy App

Start quickly your Cozy application

What's create-cozy-app?

create-cozy-app is a command line tool that creates a skeleton of an application for Cozy, using Cozy libraries.

This tool can be run as an installed CLI or by using yarn create, see below for more information.

By default, create-cozy-app will use the cozy-scripts scripts bundle to build your app based on React.

You can find a complete tutorial about creating a Cozy application using create-cozy-app in the official documentation (


Bootstrap an application

You can use create-cozy-app without installing it globally using yarn create (yarn create documentation):

yarn create cozy-app mycozyapp
You can also install the package globally.
yarn global add create-cozy-app
create-cozy-app mycozyapp

⚠️ By using a locally installed CLI, you will have to update it regularly to keep the app template up to date. It is why we recommend to use directly yarn create which will always uses the latest version of the CLI.

It will

  • download dependencies (it may take a while, you can go grab a coffee)
  • ask you a few questions
  • then create an application skeleton inside mycozyapp.

Start developing

ℹ️ See this tutorial for more information on how to develop a cozy-app. Below, you'll find just the essential.

You can start developing with:

cd mycozyapp
yarn start

This starts a webpack-dev-server that continuously builds the application into the build folder.

If not already started, you should start a cozy-stack serving this folder:

touch ~/cozy.yaml # You can edit this file to configure the stack
docker run -ti --rm -p 8080:8080 -p 5984:5984 -p 8025:8025 -v (pwd)/build:/data/cozy-app/mycozyapp -v ~/cozy.yaml:/etc/cozy/cozy.yaml cozy/cozy-app-dev

You app should now be available at


--scripts-source (useful for hacking)

You can pass a custom scripts package using the optional --scripts-source option, it can be one of:

  • a relative local path to a tarball (fileRel: prefix): fileRel:./a-folder/my-cozy-scripts.tar.gz
  • an absolute local path to a tarball (fileAbs: prefix): fileAbs:/root/my-cozy-scripts.tar.gz
  • an URL to a tarball (url: prefix): url:
  • a specific npm version (version: prefix): version:0.1.5
  • a specific git commit/branch with name provided after the '#' (git: prefix): git://

Using this options, create-cozy-app will be run in a more verbose way, useful for debugging or understanding what the script does.


What's Cozy?

Cozy is a platform that brings all your web services in the same private space. With it, your webapps and your devices can share data easily, providing you with a new experience. You can install Cozy on your own hardware where no one's tracking you.

Get in touch

You can reach the Cozy Community by:


create-cozy-app is distributed under the MIT license.

CCA logo by @CPatchane.