Skip to content


Switch branches/tags

Name already in use

A tag already exists with the provided branch name. Many Git commands accept both tag and branch names, so creating this branch may cause unexpected behavior. Are you sure you want to create this branch?

Latest commit

+ Expand the example app to demo backend state serialization to cover more cases of instantiation of generic types: Add tuples, records, and instances of 'Maybe' with generic type arguments.
+ Automate test to assert that the demo app program code compiles.
+ Fix the concretization of generic type instances in compilation to generate JSON coding functions: Add coverage for 'instance', 'record', and 'tuple' cases.

Git stats


Failed to load latest commit information.

Elm Full-Stack

Elm Fullstack is a tool for developing web services and full-stack web applications. It leverages the Elm programming language and its ecosystem of libraries. As it evolves, Elm Fullstack automates more and more activities in software development that humans had performed in the past.

Elm Fullstack currently offers:

  • Persisting and restoring the state of backend Elm apps.
  • Migrating the backend state when deploying a new program version: Design Report - Migrations in Elm Fullstack Deployments
  • Generating functions to serialize and deserialize Elm values based on type declarations from Elm programs.
  • Ports to integrate and interoperate with custom components written in any programming language.
  • A single executable file (per operating system) integrating all tools with a command-line interface.

Getting Started

Use this command to run a server and deploy an example app:

elm-fs  run-server  --public-urls="http://*:5000"  --deploy=

For a guide on installation and configuration options, see How to Configure and Deploy an Elm Fullstack App.

Releases / Artifacts

elm-fs Executable File

The elm-fs executable file contains all the functionality to build apps and operate backend processes. You can download the files from the releases section on GitHub.

Docker Image

If you prefer deploying using docker, use the elmfullstack/elm-fullstack image from docker hub. The tags are aligned with the version IDs in the CLI executable file.

docker  run  -p 5000:80  -p 4000:4000  --env "APPSETTING_adminPassword=test" elmfullstack/elm-fullstack

To learn more about these artifacts' interfaces, see How to Configure and Deploy an Elm Fullstack App.

Building from Source

The easiest way to test a change in the source code is to trigger the GitHub action workflow in .github/workflows/test-and-publish.yml. This workflow gets you the results of automated tests and your version of the executable files. Push to your fork on GitHub to trigger this action.

As we can see in the workflow file, the project uses .NET 7 to build the executable file and run tests. You can download the dotnet tool from to build and test locally.

Example Apps

Rich Chat Room

The rich chat room example app demonstrates features typically found in a chat app, such as user names, message rate-limiting, sound effects, etc. For a detailed description of this app, see the readme file at

Elm Editor

Elm Editor is a web app for developing Elm programs.

As an integrated development environment, it assists us in reading, writing, and testing Elm programs and in collaborating with other developers.

To see Elm Editor in action, check out the public instance at

To learn more about Elm Editor, see