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Satsuki Yanagi ad94e1d50a Add ffmpeg buildpack for scalingo (#8500) 6 years ago
.circleci Use CircleCI workflows for ruby dependencies (#8228) 6 years ago
.github Multiple Issue templates (#7402) 6 years ago
app Reduce padding of profile metadata boxes to allow more text (#8491) 6 years ago
bin Add improved CLI interface for removing remote media (#8411) 6 years ago
config Display pending message on admin relays UI (#8494) 6 years ago
db Add missing indices for ON DELETE CASCADE constraints (#8332) 6 years ago
docs Fix redirect link on (#1595) 7 years ago
lib Add CLI task for rotating keys (#8466) 6 years ago
log Initial commit 8 years ago
nanobox [Nanobox] Tuning Update (#6660) 6 years ago
public update twemojie to v2 (#7911) 6 years ago
spec formatter spec fixes & clarification (#8481) 6 years ago
streaming Add health endpoint to streaming API (#8441) 6 years ago
vendor/assets Initial commit 8 years ago
.babelrc Remove debug option from Babel preset env (#6852) 6 years ago
.buildpacks Add ffmpeg buildpack for scalingo (#8500) 6 years ago
.codeclimate.yml fix RuboCop error (#7442) 6 years ago
.dockerignore Add .bundle to .dockerignore (#7895) 6 years ago
.editorconfig Add final newline to locale files (#2890) 7 years ago
.env.nanobox Rename S3_CLOUDFRONT_HOST to S3_ALIAS_HOST. (#8423) 6 years ago
.env.production.sample Rename S3_CLOUDFRONT_HOST to S3_ALIAS_HOST. (#8423) 6 years ago
.env.test Add parallel test processors (#7215) 6 years ago
.env.vagrant Add a default to .env.vagrant 7 years ago
.eslintignore Dev Tooling fixes (eslint/editorconfig) (#1398) 7 years ago
.eslintrc.yml Update ESLint for Code Climate (#7696) 6 years ago
.foreman Replace sprockets/browserify with Webpack (#2617) 7 years ago
.gitattributes Add .gitattributes file to avoid unwanted CRLF (#3954) 7 years ago
.gitignore Ignore elasticsearch directory (#7070) 6 years ago
.haml-lint.yml Added haml-lint and fix warnings (#2773) 7 years ago
.nanoignore Remove Storybook (#4397) 7 years ago
.nvmrc Upgrade Node.js to v8.x on nvmrc (#8023) 6 years ago
.postcssrc.yml Add object-fit polyfill for Edge (#4182) 7 years ago
.profile Add ffmpeg and dependent packages as well as LD_LIBRARY_PATHs (#3276) 7 years ago
.rspec Adding a Mention model, test stubs 8 years ago
.rubocop.yml Fix low-hanging rubocop gripes (#8458) 6 years ago
.ruby-version Update Ruby to version 2.4.4 (#6964) 6 years ago
.scss-lint.yml Enable CodeClimate SCSS Lint checks (#2886) 7 years ago
.slugignore Remove Storybook (#4397) 7 years ago
.yarnclean Reduce container size with clean yarn (#3506) 7 years ago docs: Add AUTHORS file (#6685) 6 years ago
Aptfile Add dependencies for uWebSockets (#7466) 6 years ago Add code of conduct from GitHub generator (#5674) 7 years ago Improve “how to translate” (#7358) 6 years ago
Capfile remove capistrano/faster_assets from Capfile (#2737) 7 years ago
Dockerfile Dockerfile: run asset precompilation as a build step (#7780) 6 years ago
Gemfile Add thor to Gemfile directly (#8467) 6 years ago
Gemfile.lock Add thor to Gemfile directly (#8467) 6 years ago
LICENSE Fix #49 - License changed from GPL-2.0 to AGPL-3.0 8 years ago
Procfile More robust PuSH subscription refreshes (#2799) 7 years ago Fix Procfile on OS X (#6748) 6 years ago Remove reference to BTC, update video link 6 years ago
Rakefile Initial commit 8 years ago
Vagrantfile Fix nodejs 8.x install in vagrant (#8105) 6 years ago
app.json Change logo URL for Heroku and Scalingo (#4476) 7 years ago
boxfile.yml [Nanobox] Enable ElasticSearch support by default (#6977) 6 years ago Fix rubocop issues, introduce usage of frozen literal to improve performance 8 years ago
docker-compose.yml Update docker-compose to cope with build-time assets (#8156) 6 years ago
jest.config.js Enable coverage for Jest (#5442) 7 years ago
package.json Redesign public profiles and toots (#8068) 6 years ago
priv-config TOR federation (#7875) 6 years ago
scalingo.json Add ffmpeg buildpack for scalingo (#8500) 6 years ago
yarn.lock Redesign public profiles and toots (#8068) 6 years ago


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.



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


Copyright (C) 2016-2018 Eugen Rochko & other Mastodon contributors (see

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

Extra credits

The elephant friend illustrations are created by Dopatwo