amber v1.0.0rc2

A Crystal web framework that makes building applications fast, simple, and enjoyable. Get started with quick prototyping, less bugs, and blazing fast performance.


Productivity. Performance. Happiness.

Amber makes building web applications fast, simple, and enjoyable - with fewer bugs and blazing fast performance.

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Liberapay patrons Gitter

Welcome to Amber

Amber is a web application framework written in Crystal inspired by Kemal, Rails, Phoenix and other popular application frameworks.

The purpose of Amber is not to create yet another framework, but to take advantage of the beautiful Crystal language capabilities and provide engineers and the Crystal community with an efficient, cohesive, well maintained web framework that embraces the language philosophies, conventions, and guidelines.

Amber borrows concepts that have already been battle tested and successful, and embraces new concepts through team and community collaboration and analysis, which also aligns with Crystal's philosophy.


Questions? Join our IRC channel #amber or Gitter room or ask on Stack Overflow under the amber-framework tag.

Guidelines? We have adopted the Contributor Covenant to be our CODE OF CONDUCT for Amber.

Our Philosophy? Read Amber Philosophy H.R.T.


Read Amber documentation on


Techempower Framework Benchmarks - Round 18 (2019-07-09)

  • Filtered by Full Stack, Full ORM, Mysql or Pg for comparing similar frameworks.

Installation & Usage


brew tap amberframework/amber
brew install amber


git clone
cd amber
git checkout stable
sudo make install

If you're using ArchLinux or similar distro try:

yay -S amber


To compile a local bin/amber per project use shards build amber

To use it as dependency, add this to your application's shard.yml:

    github: amberframework/amber

Read Amber quick start guide

Read Amber CLI commands usage

Read more about Amber CLI installation guide

Have an Amber-based Project?

Use Amber badge

Amber Framework

[![Amber Framework](](

Release Checklist

  • Test and release all dependencies
  • Test everything locally
  • Run crelease 0.36.0
  • repoint amber to master branch in src/amber/cli/templates/app/shard.yml.ecr template
  • update release notes
  • update homebrew version and sha
  • update linux repositories
  • build and deploy docker image:
    • verify Dockerfile is using the latest crystal version
    • docker login
    • docker build -t amberframework/amber:0.36.0
    • docker push amberframework/amber:0.36.0


Contributing to Amber can be a rewarding way to learn, teach, and build experience in just about any skill you can imagine. You don’t have to become a lifelong contributor to enjoy participating in Amber.

Tracking issues? Check our project board.

Code Triage? Join us on codetriage.

Open Source Contributors

Amber is a community effort and we want You to be part of it. Join Amber Community!

  1. Fork it
  2. Create your feature branch git checkout -b my-new-feature
  3. Write and execute specs and formatting checks ./bin/amber_spec
  4. Commit your changes git commit -am 'Add some feature'
  5. Push to the branch git push origin my-new-feature
  6. Create a new Pull Request


See more Amber contributors


This project is licensed under the MIT License - see the LICENSE file for details


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MIT License

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Thu, 22 Jul 2021 21:47:55 GMT