Mastodon Instance Closed Registrations: How to Find Open Ones

You tried to sign up for a Mastodon instance, but the registration button is grayed out or missing. This happens when the instance administrator has closed new account sign-ups. Many Mastodon instances close registrations to manage server load, prevent spam, or maintain community quality. This article explains why instances close registrations and provides step-by-step methods to find open instances that fit your interests.

Why Mastodon Instances Close Registrations

Mastodon is decentralized. Each instance is independently run by a person or small team. When an instance closes registrations, it means the admin has decided to stop accepting new users. Common reasons include limited server resources such as CPU, RAM, or disk space. A small server with a single administrator cannot handle thousands of new accounts without performance degradation.

Another reason is community moderation. Some instances focus on specific topics like art, technology, or LGBTQ+ discussions. The admin may want to keep the community small and manageable to maintain a specific culture. Spam prevention is also a factor. Open instances often attract automated spam accounts. By closing registrations, admins reduce this burden.

Finally, some instances use an application process. You fill out a form and wait for approval. This is not a closed registration in the strict sense, but it does not allow immediate sign-up. Understanding these reasons helps you narrow your search to instances that match your needs.

How to Find Mastodon Instances with Open Registrations

The following methods list active Mastodon instances that currently accept new users. Each method works differently, so use the one that fits your preference.

Method 1: Use the Official Mastodon Instance Directory

1. Open joinmastodon.org/servers
   Navigate to joinmastodon.org/servers in your web browser. This is the official directory maintained by Mastodon gGmbH, the nonprofit behind Mastodon.
2. Filter by registration status
   Use the dropdown menu labeled “Registration” and select “Open.” The list updates to show only instances that accept new sign-ups.
3. Apply additional filters
   Select your language from the “Language” dropdown. Choose a category from “Category” if you want a topic-focused instance. The available categories include Art, Gaming, Journalism, Music, and Technology.
4. Review instance details
   Click any instance name to see its description, server rules, and moderator contact. Confirm the registration button is active before proceeding.

Method 2: Search with Instances.Social

1. Go to instances.social
   Open instances.social in your browser. This is a third-party directory that indexes thousands of Mastodon instances.
2. Set the registration filter
   Locate the filter panel on the left side. Under “Registration,” check the box for “Open.” The server list refreshes automatically.
3. Sort by user count or uptime
   Click the “Users” column header to sort by total users. Click “Uptime” to see which servers are most reliable. Instances with 99% or higher uptime are generally stable.
4. Click an instance to visit its sign-up page
   Select any instance to open its details. Click the “Visit Instance” button to go directly to the registration page. Verify the sign-up form works.

Method 3: Browse Fediverse.info/explore

1. Open fediverse.info/explore
   Navigate to fediverse.info/explore. This community tool aggregates data from multiple sources and provides detailed instance metadata.
2. Enable the open registration filter
   Click the “Filters” button. Toggle “Open Registration” to the on position. The page shows only instances that allow new sign-ups.
3. Read instance descriptions
   Each card shows the instance name, user count, and a short description. Click “Details” to see full server rules, moderator list, and software version.
4. Check the approval requirement
   Look for the “Approval Required” field in the details. If it says “Yes,” you must submit an application. If “No,” sign-up is immediate.

Common Issues When Finding Open Instances

Instance shows open but sign-up fails

A directory may report an instance as open, but the actual registration page returns an error. This happens when the instance admin changed the setting recently and the directory has not updated. Wait 24 hours and check again. Alternatively, visit the instance directly and look for the “Create Account” link. If it is missing, the instance is closed regardless of directory data.

Instance is in a different language

Many open instances are run by non-English speakers. The interface language can be changed in your account settings after sign-up, but the local timeline may contain posts in that language. If you want English-language content, filter by language in the directory. Instances with a primary language set to English show English posts by default.

Instance has strict moderation rules

Some open instances enforce rules about content warnings, media bans, or behavior. Read the server rules before signing up. If the rules conflict with your posting style, choose another instance. You can always move your account to a different instance later using the account migration feature under Preferences > Account > Move from a different account.

Mastodon Instance Directories Compared

Item	joinmastodon.org/servers	instances.social	fediverse.info/explore
Maintainer	Mastodon gGmbH	Third-party	Community
Registration filter	Yes	Yes	Yes
Language filter	Yes	Yes	No
Category filter	Yes	No	No
Approval requirement shown	No	No	Yes
Uptime statistics	No	Yes	Yes
User count sort	No	Yes	No

Now you can locate a Mastodon instance with open registrations using joinmastodon.org/servers, instances.social, or fediverse.info/explore. Start by filtering for your language and preferred topic. After signing up, explore the instance’s local timeline to see if the community fits your expectations. If you later want to switch, use the account migration tool under Preferences > Account > Move from a different account to transfer your followers without losing them.