Mastodon
Federated microblogging server. Alternative to Twitter.
Open the official app on joinmastodon.org
This tool is hosted by its maintainers. Click below to open joinmastodon.org in a new tab — it's their official demo.
Browse text & tools tools →What's next with Mastodon?
Choose how you want to get started.
Use it free
Open the official tool or demo — no account needed.
Self-host it
Run the open-source version on your own infrastructure.
What is Mastodon?
Mastodon is a decentralized social media platform designed to give users control over their online presence and data. Built as an open-source project under the AGPL-3.0 license, it operates as a federated network of interconnected servers, allowing users to interact across instances while maintaining autonomy over their content and privacy. Unlike centralized platforms, Mastodon eliminates corporate data ownership and algorithmic curation, prioritizing user-defined visibility settings and local moderation policies. It caters to individuals and communities seeking alternatives to traditional social media, particularly those concerned with data privacy, content moderation, and platform neutrality. The tool addresses issues like algorithmic bias, ad-driven content prioritization, and centralized control by distributing authority to individual servers and users.
How it works
Mastodon is a decentralized social network built on the ActivityPub protocol, enabling interoperability between independent servers called instances. Users can create accounts on any instance, follow others across the network, and participate in conversations without relying on a single corporate entity. Its primary purpose is to provide a privacy-focused, ad-free alternative to mainstream social media. By decentralizing content moderation and data storage, Mastodon users to define their own rules and control their online experience. Mastodon supports federated interactions, allowing users to follow and engage with content across instances. It enables multimedia posting (audio, video, images) and includes accessibility features like text descriptions. Servers can customize moderation policies, from strict content rules to open participation.
How to use it
- 1Choose a Mastodon instance (e.g., mastodon.social) and register an account. 2. Configure privacy settings to control who can follow you or view your posts. 3. Follow users or servers, and engage with content via likes, replies, or boosts. 4. Post text, images, videos, or audio with optional accessibility descriptions. Tip: Use search filters to find communities aligned with your interests. Regularly check server-specific moderation guidelines to ensure compliance.
What it can do
- Task Management
- Blogging
Use cases
Assumptions and limitations
Assumptions
- source: https://github.com/mastodon
- license: AGPL-3.0 — free to use
- privacy: Opens an external demo
Limitations
- Technical complexity in setting up self-hosted servers
- Limited algorithmic curation may reduce content discoverability
- Cross-instance moderation inconsistencies between servers
- Smaller instance sizes compared to mainstream platforms
- Learning curve for federated network navigation
Understanding the result
Federated microblogging server. Alternative to Twitter.
Tool details
- Clearly flagged when a network request is needed.
- No account, no sign-up, and no tracking of your content.
- Powered by mastodon (MIT).
- Built with
- mastodon (https://github.com/mastodon)
- License
- MIT
- Runs locally
- No — requires a network request
- Verification
- Not yet verified
- Input
- Text
- Output
- Output
Built with https://github.com/mastodon. OpenToolVault provides the discovery and browser interface while crediting the original project maintainers.
- Built with
- mastodon
- License
- MIT
Open-source project
OpenToolVault is an independent directory. We are not affiliated with or endorsed by this project.
References
- /mastodon — GitHub Repository
Upstream project · GitHub
- AGPL-3.0 License
Upstream project
Frequently asked
How does Mastodon handle content moderation?
Each Mastodon instance sets its own moderation rules, enforced by server administrators. Users can join instances aligned with their preferred policies, from strict communities to open networks. Content removal is handled locally, with no centralized oversight. Users can report violations, but enforcement depends on the specific server's configuration.
How does Mastodon's federated model work?
Mastodon uses the ActivityPub protocol to enable communication between independent servers. When a user posts content, it is replicated across connected instances, allowing followers from any server to view it. This creates a unified network without a central authority, but requires technical setup for cross-instance interactions.
How do I post multimedia content?
To share images, video, or audio, click the 'New Post' button and select the media file from your device. Add a caption and optional accessibility description (e.g., 'A black-and-white photo of a sunset'). Choose visibility settings (public, followers-only, or private) before publishing.
How does Mastodon compare to Twitter/X?
Unlike Twitter, Mastodon is decentralized, with no single corporate owner. Content moderation is localized, and users control their data. However, Mastodon lacks Twitter's global search features and real-time trends. It also has smaller instance sizes and requires users to navigate a federated network rather than a single platform.
What should I do if I can't log in?
Check your internet connection and verify the instance URL. If using a self-hosted server, ensure the server is online and the domain is correctly configured. For public instances, try clearing browser cache or switching to incognito mode. Contact the instance administrator if issues persist.