Creator & Writing
Substack Username Availability Checker
Substack empowers independent writers and creators to launch subscription newsletters and podcasts.
Substack Username Rules & Requirements
Before selecting your username, ensure it conforms to Substack’s official account registration guidelines:
| Minimum Length | 2 characters |
|---|---|
| Maximum Length | 63 characters |
| Allowed Characters | Letters, numbers, and hyphens |
| Special Restrictions | Provides a subdomain: {username}.substack.com. |
| Public Profile URL | https://{username}.substack.com |
| Official Registration Page | https://substack.com/signup↗ |
How to Claim or Change Your Username on Substack
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 Substack" 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 Substack Handle Is Already Taken
Securing your Substack subdomain early prevents imitators from hijacking your newsletter audience.