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Written by: Jay Douglas Last updated: 16 Oct., 2026 |
This article is for free plan users who want to change their website address ending in b12sites.com. Follow the steps below to customize your B12 subdomain.
Caution: If you have a paid subscription connected to a custom domain, we do not recommend modifying your b12sites.com subdomain, as it can cause your custom domain to disconnect.
1. In the left sidebar menu, go to 
Domains
2. Select your secondary domain ending in b12sites.com.
3. Enter your desired subdomain and click Save. Your old b12sites.com address is deleted right away, so any links that use it will stop working.
Note: If the subdomain is already taken, you’ll see an alert. Simply choose another available option.