A GNU Social-compatible microblogging server
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.circleci Add CONTINUOUS_INTEGRATION: true to .circleci/config.yml (#7447) May 11, 2018
app Weblate translations (2018-06-19) (#7847) Jun 19, 2018
bin Port travis_retry for CI (#7379) May 6, 2018
config Weblate translations (2018-06-19) (#7847) Jun 19, 2018
db Remove unused indexes (#7829) Jun 17, 2018
docs Fix redirect link on Tuning.md (#1595) Apr 12, 2017
lib Merge tag 'v2.4.2' into mstdn-jp Jun 21, 2018
log Initial commit Feb 20, 2016
nanobox [Nanobox] Tuning Update (#6660) Mar 6, 2018
public Rename emoji sheet to avoid caching issue (#7777) Jun 10, 2018
spec Add tests for shares_controller (#7835) Jun 18, 2018
vendor/assets Initial commit Feb 20, 2016
.buildpacks Add heroku APT buildpack for scalingo. (#3051) May 14, 2017
.codeclimate.yml fix RuboCop error (#7442) Jun 4, 2018
.dockerignore Ignore elasticsearch directory (#7070) Apr 8, 2018
.editorconfig Add final newline to locale files (#2890) May 7, 2017
.env.nanobox [Nanobox] Enable ElasticSearch support by default (#6977) Mar 31, 2018
.env.production.sample Cache attachments on external host with service worker (#7493) May 28, 2018
.env.test Add parallel test processors (#7215) Apr 21, 2018
.env.vagrant Add a default LOCAL_DOMAIN=mastodon.dev to .env.vagrant Jan 26, 2017
.eslintignore Dev Tooling fixes (eslint/editorconfig) (#1398) Apr 10, 2017
.foreman Replace sprockets/browserify with Webpack (#2617) May 3, 2017
.gitattributes Add .gitattributes file to avoid unwanted CRLF (#3954) Jun 26, 2017
.haml-lint.yml Added haml-lint and fix warnings (#2773) May 8, 2017
.nanoignore Remove Storybook (#4397) Jul 27, 2017
.nvmrc update Node to 6.x LTS (#1228) Apr 15, 2017
.postcssrc.yml Add object-fit polyfill for Edge (#4182) Jul 13, 2017
.profile Add ffmpeg and dependent packages as well as LD_LIBRARY_PATHs (#3276) May 24, 2017
.rspec Adding a Mention model, test stubs Feb 24, 2016
.rubocop.yml fix RuboCop error (#7442) Jun 4, 2018
.ruby-version Update Ruby to version 2.4.4 (#6964) Apr 1, 2018
.scss-lint.yml Enable CodeClimate SCSS Lint checks (#2886) May 7, 2017
.slugignore Remove Storybook (#4397) Jul 27, 2017
.yarnclean Reduce container size with clean yarn (#3506) Sep 30, 2017
AUTHORS.md docs: Add AUTHORS file (#6685) Mar 9, 2018
Aptfile Specify libicu explicitly in Aptfile (#4920) Sep 13, 2017
CODE_OF_CONDUCT.md Add code of conduct from GitHub generator (#5674) Nov 13, 2017
CONTRIBUTING.md Improve “how to translate” (#7358) May 4, 2018
Gemfile Remove rack-timeout (#7809) Jun 15, 2018
Gemfile.lock Update bcrypt to 3.1.12 fix issue with Fedora (#7845) Jun 18, 2018
Procfile More robust PuSH subscription refreshes (#2799) May 5, 2017
Procfile.dev Fix Procfile on OS X (#6748) Mar 12, 2018
README.md Replace badge to CircleCI (#7216) Apr 21, 2018
boxfile.yml [Nanobox] Enable ElasticSearch support by default (#6977) Mar 31, 2018
config.ru Fix rubocop issues, introduce usage of frozen literal to improve perf… Nov 15, 2016
docker-compose.yml Remove Puma pidfile before boot if container receives SIGTERM (#7052) May 25, 2018
scalingo.json Missing OTP_SECRET in scalingo.json (#6917) Mar 26, 2018



Build Status Code Climate

Mastodon is a free, open-source social network server based on open web protocols like ActivityPub and OStatus. The social focus of the project is a viable decentralized alternative to commercial social media silos that returns the control of the content distribution channels to the people. The technical focus of the project is a good user interface, a clean REST API for 3rd party apps and robust anti-abuse tools.

Click on the screenshot below to watch a demo of the UI:


Ruby on Rails is used for the back-end, while React.js and Redux are used for the dynamic front-end. A static front-end for public resources (profiles and statuses) is also provided.

If you would like, you can support the development of this project on Patreon or Liberapay. Alternatively, you can donate to this BTC address: 17j2g7vpgHhLuXhN4bueZFCvdxxieyRVWd



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

It doesn't have to be Mastodon, whatever implements ActivityPub or OStatus is part of the social network!

Real-time timeline updates

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

Federated thread resolving

If someone you follow replies to a user unknown to the server, the server fetches the full thread so you can view it without leaving the UI

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 are looped - like vines!

OAuth2 and a straightforward REST API

Mastodon acts as an OAuth2 provider so 3rd party apps can use the API

Fast response times

Mastodon tries to be as fast and responsive as possible, so all long-running tasks are delegated to background processing

Deployable via Docker

You don't need to mess with dependencies and configuration if you want to try Mastodon, if you have Docker and Docker Compose the deployment is extremely easy


Please follow the development guide from the documentation repository.


There are guides in the documentation repository for deploying on various platforms.


You can open issues for bugs you've found or features you think are missing. You can also submit pull requests to this repository. Here are the guidelines for code contributions

IRC channel: #mastodon on irc.freenode.net


Copyright (C) 2016-2018 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/.

Extra credits

The elephant friend illustrations are created by Dopatwo