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Matt Jankowski ae39bed95b
Solve remaining `db/*migrate*` cops (#28579)
2024-01-04 16:40:28 +00:00
.devcontainer Fix devcontainer by not forcing `NODE_ENV` (#28099) 2023-11-28 14:47:32 +00:00
.github Update github/codeql-action action to v3 (#28495) 2023-12-29 10:22:43 +00:00
.husky Use Yarn instead of NPX for pre-commit hook (#24287) 2023-03-28 06:28:57 +02:00
.yarn Replace our custom `compression-webpack-plugin` patch with the fixed upstream version (#28510) 2023-12-29 09:33:06 +00:00
app Fix scrolling to detailed status not always working (#28577) 2024-01-04 14:17:38 +00:00
bin Move the mastodon/*_cli files to mastodon/cli/* (#24139) 2023-05-23 16:08:26 +02:00
chart helm: cleanup helm chart, now in mastodon/chart (#21801) 2022-12-09 06:36:29 +01:00
config New Crowdin Translations (automated) (#28590) 2024-01-04 09:24:13 +00:00
db Solve remaining `db/*migrate*` cops (#28579) 2024-01-04 16:40:28 +00:00
dist Add suggestion for secure cyphers to nginx.conf (#26349) 2023-08-31 12:17:10 +02:00
lib Use heredoc on federation CLI warning strings (#28578) 2024-01-04 09:21:27 +00:00
public Change: Block GPTBot (#26396) 2023-08-09 11:58:46 +02:00
spec Fix `Capybara/ClickLinkOrButtonStyle` cop in spec/features (#28576) 2024-01-04 09:20:32 +00:00
streaming Streaming: use standard cors package instead of custom implementation (#28523) 2024-01-04 09:18:03 +00:00
.browserslistrc Add ES6 compatibility to browserslist (#18519) 2022-05-26 20:29:28 +02:00
.dockerignore Do not copy `public/packs-test` into Docker (#27736) 2023-11-07 09:22:04 +00:00
.editorconfig Enable EditorConfig trailing whitespace trimming (#23543) 2023-02-12 08:34:17 +01:00
.env.production.sample fix: remove SMTP_SERVER (#21342) 2022-12-15 18:42:08 +01:00
.env.test Improve Babel configuration and automatically load polyfills (#27333) 2023-10-31 10:55:13 +00:00
.env.vagrant Add elastic search installation into Vagrantfile (#26512) 2023-08-23 15:46:14 +02:00
.eslintrc.js Enable the eslint `react/no-unknown-property` rule (#28217) 2023-12-06 13:42:12 +00:00
.gitignore Upgrade to Yarn 4, remove support for Node 16 (#27073) 2023-11-08 10:57:21 +00:00
.haml-lint.yml Update haml-lint line length configuration to match rubocop value (#27570) 2023-10-31 09:47:16 +00:00
.haml-lint_todo.yml Fix `Style/SoleNestedConditional` and `Style/IfInsideElse` cops, regenerate haml todo (#28384) 2023-12-18 10:06:42 +00:00
.nvmrc Update dependency node to 20.10 (#28040) 2023-12-19 12:39:59 +00:00
.prettierignore Remove Capistrano (#27295) 2023-10-06 11:33:43 +02:00
.prettierrc.js Use Prettier for ESLint formatting TypeScript (#23631) 2023-05-09 19:02:12 +02:00
.profile Make it possible to upload audio and video to Heroku app (#24866) 2023-05-05 14:41:07 +02:00
.rubocop.yml Solve `Abc/*` metrics for `db/*migrate*` files (#28568) 2024-01-03 13:22:03 +00:00
.rubocop_todo.yml Solve remaining `db/*migrate*` cops (#28579) 2024-01-04 16:40:28 +00:00
.ruby-gemset Make Mastodon use its own gemset (#17858) 2022-08-13 15:44:34 +02:00
.ruby-version Bump ruby to 3.2.2 due to ReDoS vulnerabilities (#24320) 2023-03-31 18:28:40 +02:00
.simplecov Disable simplecov `enable_coverage_for_eval` option, move to standalone file (#27869) 2023-11-15 23:09:31 +00:00
.watchmanconfig Fix Jest config (#27834) 2023-11-13 12:19:41 +00:00
.yarnrc.yml Upgrade to Yarn 4, remove support for Node 16 (#27073) 2023-11-08 10:57:21 +00:00
AUTHORS.md Update AUTHORS.md (#27018) 2023-09-21 14:42:15 +02:00
Aptfile Make it possible to upload audio and video to Heroku app (#24866) 2023-05-05 14:41:07 +02:00
CHANGELOG.md Prune the changelog of older entries (#27432) 2023-10-23 14:35:56 +02:00
CODE_OF_CONDUCT.md Update Contributor Covenant to 2.1 (#23980) 2023-04-23 23:11:50 +02:00
CONTRIBUTING.md Update CONTRIBUTING.md with additional requirements for API additions (#28274) 2023-12-08 09:52:28 +00:00
Dockerfile Add wget to base Dockerfile (#28548) 2024-01-02 08:47:38 +00:00
FEDERATION.md Update FEDERATION.md (#26819) 2023-09-06 16:28:31 +02:00
Gemfile Replace Sprockets with Propshaft (#28239) 2023-12-06 10:19:24 +00:00
Gemfile.lock Fix `Capybara/ClickLinkOrButtonStyle` cop in spec/features (#28576) 2024-01-04 09:20:32 +00:00
Procfile fix: make Procfile compatible with herokuish (#12685) 2020-08-29 19:00:30 +02:00
Procfile.dev Split streaming server from web server (#24702) 2023-11-14 17:43:20 +00:00
README.md Update copyright year to 2024 (#28550) 2024-01-01 19:08:01 +00:00
Rakefile Run Rubocop on Rakefile (#23871) 2023-07-12 09:47:54 +02:00
SECURITY.md Remove v3.5 branch from supported Mastodon versions (#28574) 2024-01-03 15:04:10 +00:00
Vagrantfile Change Vagrant to install Node 20 (#28100) 2023-11-30 10:46:06 +00:00
app.json Make enable_starttls configurable by envvars (#20321) 2022-11-10 21:06:21 +01:00
babel.config.js Disable Babel polyfill injection in dev (#27691) 2023-11-06 10:24:41 +00:00
config.ru Autofix Rubocop remaining Layout rules (#23679) 2023-02-20 06:58:28 +01:00
crowdin.yml Add a Github Action to send translations to Crowdin for each merge in main (#25869) 2023-07-18 16:56:01 +02:00
docker-compose.yml Change startup command for Puma in Docker Compose (#28138) 2023-12-01 11:06:37 +00:00
jest.config.js Fix Jest config (#27834) 2023-11-13 12:19:41 +00:00
jsconfig.json Correct prettier calls for YML/JSON (#21832) 2022-12-03 12:05:35 +09:00
package.json Update dependency stylelint-config-standard-scss to v13 (#28589) 2024-01-04 09:24:43 +00:00
postcss.config.js Update PostCSS dependencies (#23835) 2023-03-15 04:01:10 +01:00
scalingo.json Add S3 region list reference to Scalingo config (#24152) 2023-04-26 16:46:19 +02:00
stylelint.config.js Update Stylelint disable settings and ignores (#23776) 2023-04-23 22:47:57 +02:00
tsconfig.json Use the new JSX transform (#25064) 2023-05-23 10:52:27 +02:00
yarn.lock Update dependency stylelint-config-standard-scss to v13 (#28589) 2024-01-04 09:24:43 +00:00



GitHub release Ruby Testing Crowdin

Mastodon is a free, open-source social network server based on ActivityPub where users can follow friends and discover new ones. On Mastodon, users can publish anything they want: links, pictures, text, and video. All Mastodon servers are interoperable as a federated network (users on one server can seamlessly communicate with users from another one, including non-Mastodon software that implements ActivityPub!)

Click below to learn more in a video:




No vendor lock-in: Fully interoperable with any conforming platform

It doesn't have to be Mastodon; whatever implements ActivityPub is part of the social network! Learn more

Real-time, chronological timeline updates

Updates of people you're following appear in real-time in the UI via WebSockets. There's a firehose view as well!

Media attachments like images and short videos

Upload and view images and WebM/MP4 videos attached to the updates. Videos with no audio track are treated like GIFs; normal videos loop continuously!

Safety and moderation tools

Mastodon includes private posts, locked accounts, phrase filtering, muting, blocking, and all sorts of other features, along with a reporting and moderation system. Learn more

OAuth2 and a straightforward REST API

Mastodon acts as an OAuth2 provider, so 3rd party apps can use the REST and Streaming APIs. This results in a rich app ecosystem with a lot of choices!


Tech stack

  • Ruby on Rails powers the REST API and other web pages
  • React.js and Redux are used for the dynamic parts of the interface
  • Node.js powers the streaming API


  • PostgreSQL 12+
  • Redis 4+
  • Ruby 2.7+
  • Node.js 16+

The repository includes deployment configurations for Docker and docker-compose as well as specific platforms like Heroku, Scalingo, and Nanobox. For Helm charts, reference the mastodon/chart repository. The standalone installation guide is available in the documentation.



A Vagrant configuration is included for development purposes. To use it, complete the following steps:

  • Install Vagrant and Virtualbox
  • Install the vagrant-hostsupdater plugin: vagrant plugin install vagrant-hostsupdater
  • Run vagrant up
  • Run vagrant ssh -c "cd /vagrant && foreman start"
  • Open http://mastodon.local in your browser


To set up MacOS for native development, complete the following steps:

  • Install the latest stable Ruby version (use a Ruby version manager for easy installation and management of Ruby versions)
  • Run brew install postgresql@14
  • Run brew install redis
  • Run brew install imagemagick
  • Run brew install libidn
  • Install Foreman or a similar tool (such as overmind) to handle multiple process launching.
  • Navigate to Mastodon's root directory and run brew install nvm then nvm use to use the version from .nvmrc
  • Run corepack enable && corepack prepare
  • Run bundle exec rails db:setup (optionally prepend RAILS_ENV=development to target the dev environment)
  • Finally, run overmind start -f Procfile.dev


For development with Docker, complete the following steps:

  • Install Docker Desktop
  • Run docker compose -f .devcontainer/docker-compose.yml up -d
  • Run docker compose -f .devcontainer/docker-compose.yml exec app .devcontainer/post-create.sh
  • Finally, run docker compose -f .devcontainer/docker-compose.yml exec app foreman start -f Procfile.dev

If you are using an IDE with support for the Development Container specification, it will run the above docker compose commands automatically. For Visual Studio Code this requires the Dev Container extension.

GitHub Codespaces

To get you coding in just a few minutes, GitHub Codespaces provides a web-based version of Visual Studio Code and a cloud-hosted development environment fully configured with the software needed for this project..

  • Click this button to create a new codespace:
    Open in GitHub Codespaces
  • Wait for the environment to build. This will take a few minutes.
  • When the editor is ready, run foreman start -f Procfile.dev in the terminal.
  • After a few seconds, a popup will appear with a button labeled Open in Browser. This will open Mastodon.
  • On the Ports tab, right click on the “stream” row and select Port visibilityPublic.


Mastodon is free, open-source software licensed under AGPLv3.

You can open issues for bugs you've found or features you think are missing. You can also submit pull requests to this repository or submit translations using Crowdin. To get started, take a look at CONTRIBUTING.md. If your contributions are accepted into Mastodon, you can request to be paid through our OpenCollective.

IRC channel: #mastodon on irc.libera.chat


Copyright (C) 2016-2024 Eugen Rochko & other Mastodon contributors (see AUTHORS.md)

This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Affero General Public License for more details.

You should have received a copy of the GNU Affero General Public License along with this program. If not, see https://www.gnu.org/licenses/.