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Akihiko Odaki 4e71b104e6 Internationalize unexpected error message (#6887) 6 years ago
.github Move files for GitHub to .github directory (#5989) 7 years ago
app Internationalize unexpected error message (#6887) 6 years ago
bin Update dependencies for Ruby (2017-10-30) (#5566) 7 years ago
config Weblate translations (2018-03-23) (#6874) 6 years ago
db Federate pinned statuses over ActivityPub (#6610) 6 years ago
docs Fix redirect link on (#1595) 7 years ago
lib Bump version to 2.3.2 6 years ago
log Initial commit 9 years ago
nanobox [Nanobox] Tuning Update (#6660) 6 years ago
public add new avatar placeholder missing.png (#6728) 6 years ago
spec request: in the event of failure, try other IPs (#6761) (#6813) 6 years ago
streaming Make sure call `done();` in the listener of public timeline for anonymous connection (#6009) 7 years ago
vendor/assets Initial commit 9 years ago
.babelrc Remove debug option from Babel preset env (#6852) 6 years ago
.buildpacks Add heroku APT buildpack for scalingo. (#3051) 7 years ago
.codeclimate.yml Upgrade ESLint to version 4.x (#6276) 7 years ago
.dockerignore Remove Storybook (#4397) 7 years ago
.editorconfig Add final newline to locale files (#2890) 7 years ago
.env.nanobox [Nanobox] Tuning Update (#6660) 6 years ago
.env.production.sample rename pam email environment variable to something more understandable and default to LOCAL_DOMAIN (better fallback) (#6833) 6 years ago
.env.test Provide default OTP_SECRET value for development environment (#6617) 6 years ago
.env.vagrant Add a default to .env.vagrant 8 years ago
.eslintignore Dev Tooling fixes (eslint/editorconfig) (#1398) 7 years ago
.eslintrc.yml Upgrade ESLint to version 4.x (#6276) 7 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 Fix #5274 - Create symlink from public/500.html to public/assets/500.html (#5288) 7 years ago
.haml-lint.yml Added haml-lint and fix warnings (#2773) 7 years ago
.nanoignore Remove Storybook (#4397) 7 years ago
.nvmrc update Node to 6.x LTS (#1228) 7 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 9 years ago
.rubocop.yml Add handling of Linked Data Signatures in payloads (#4687) 7 years ago
.ruby-version Add support Ruby v2.5.0 (#6097) 7 years ago
.scss-lint.yml Enable CodeClimate SCSS Lint checks (#2886) 7 years ago
.slugignore Remove Storybook (#4397) 7 years ago
.travis.yml Do not run lint in Travis CI (#6763) 6 years ago
.yarnclean Reduce container size with clean yarn (#3506) 7 years ago docs: Add AUTHORS file (#6685) 6 years ago
Aptfile Specify libicu explicitly in Aptfile (#4920) 7 years ago Add code of conduct from GitHub generator (#5674) 7 years ago README tidy up (#2026) 7 years ago
Capfile remove capistrano/faster_assets from Capfile (#2737) 7 years ago
Dockerfile Re-add git and nodejs-npm to Dockerfile (#6810) 6 years ago
Gemfile Update sanitize and loofah (#6855) 6 years ago
Gemfile.lock Update sanitize and loofah (#6855) 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 Add license info to README (#6583) 6 years ago
Rakefile Initial commit 9 years ago
Vagrantfile Upgrade Vagrant box to Xenial (#6421) 7 years ago
app.json Change logo URL for Heroku and Scalingo (#4476) 7 years ago
boxfile.yml [Nanobox] Stream backups to the warehouse (#6799) 6 years ago Fix rubocop issues, introduce usage of frozen literal to improve performance 8 years ago
docker-compose.yml Separate chown command in Dockerfile. Use tootsuite/mastodon image (#6662) 6 years ago
jest.config.js Enable coverage for Jest (#5442) 7 years ago
package.json Add polyfill for Object.values (#6697) 6 years ago
scalingo.json Change logo URL for Heroku and Scalingo (#4476) 7 years ago
yarn.lock Run tests with npm-run-all (#6688) 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. 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


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