Social Media
Mastodon Username Availability Checker
Mastodon is an open-source decentralized federated microblogging network on the Fediverse.
Mastodon Username Rules & Requirements
Before selecting your username, ensure it conforms to Mastodon’s official account registration guidelines:
| Minimum Length | 1 characters |
|---|---|
| Maximum Length | 30 characters |
| Allowed Characters | Alphanumeric and underscores |
| Special Restrictions | Checked across standard mastodon.social instance. |
| Public Profile URL | https://mastodon.social/@{username} |
| Official Registration Page | https://joinmastodon.org/↗ |
How to Claim or Change Your Username on Mastodon
1
Check Availability
Use the input above to confirm your handle satisfies all formatting constraints and character limits.
2
Visit Official Page
Click the "Claim on Mastodon" button to navigate directly to the verified sign up or profile settings.
3
Secure & Save
Complete registration immediately to prevent automated bots or squatters from claiming your handle.
What to Do If Your Desired Mastodon Handle Is Already Taken
Federated handles look like @user@instance.social, letting you own your community experience.