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Yamagishi Kazutoshi 0a103c7749 Upgrade ESLint to version 4.x (#6276) 5 years ago
.github Move files for GitHub to .github directory (#5989) 5 years ago
app Upgrade ESLint to version 4.x (#6276) 5 years ago
bin Update dependencies for Ruby (2017-10-30) (#5566) 5 years ago
config Update Simplified Chinese translations (#6280) 5 years ago
db add index on statuses for /api/v1/accounts/:account_id/statuses (#6202) 5 years ago
docs Fix redirect link on (#1595) 5 years ago
lib HTML e-mails for UserMailer (#6256) 5 years ago
log Initial commit 7 years ago
nanobox [Nanobox] Apply Release Notes Changes (#5670) 5 years ago
public Add artist, title, and date metadata to boop.{mp3,ogg} (#5531) 5 years ago
spec Use be_within instead of eq for a to_f test match (#6275) 5 years ago
streaming Make sure call `done();` in the listener of public timeline for anonymous connection (#6009) 5 years ago
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.rspec Adding a Mention model, test stubs 7 years ago
.rubocop.yml Add handling of Linked Data Signatures in payloads (#4687) 5 years ago
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Dockerfile Update Yarn to version 1.3.2 (#5900) 5 years ago
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Procfile More robust PuSH subscription refreshes (#2799) 5 years ago Upgrade Webpacker to version 3.0.1 (#5122) 5 years ago fix Code Climate badge on (#5671) 5 years ago
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app.json Change logo URL for Heroku and Scalingo (#4476) 5 years ago
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docker-compose.yml Specify middleware versions in docker-compose.yml (#5247) 5 years ago Some Dockerfile improvements (#3182) 5 years ago
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package.json Upgrade ESLint to version 4.x (#6276) 5 years ago
scalingo.json Change logo URL for Heroku and Scalingo (#4476) 5 years ago
yarn.lock Upgrade ESLint to version 4.x (#6276) 5 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. 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

Extra credits

The elephant friend illustrations are created by Dopatwo