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How to Add a Subdomain in Webflow

Learn how to add a subdomain (blog., app.) to your Webflow project with a CNAME record.

In this tutorial, Sandro, cofounder of Gemeos Webflow agency, shows you how to add a subdomain (blog.mysite.com, app.mysite.com) to your Webflow project.

TypeExampleDNS record
www subdomainwww.mysite.comCNAME to proxy.webflow.com
Custom subdomainblog.mysite.comCNAME to proxy.webflow.com
Root domainmysite.comA to Webflow IP

1. Add the subdomain in Webflow

In Publishing > Custom Domains, click Add Domain and enter your full subdomain (for example: blog.mysite.com). Webflow generates the CNAME record you need to create with your registrar.

2. Create the CNAME record with your registrar

In your registrar, create a CNAME record: Name = blog (or your subdomain prefix), Value = proxy.webflow.com. Save it and wait for DNS propagation (15 min to 24h).

3. Verify and publish

Back in Webflow Publishing, click Check DNS for the subdomain. Once it's validated, publish to that domain. SSL is generated automatically.

Conclusion

Webflow subdomains are set up exactly like primary domains. See also: connect a domain name on Webflow.

Published on May 19, 2026

Sandro DA SILVA

Growth Marketer, Webflow expert, and jack-of-all-trades. Sandro handles commercial operations, ensures projects run smoothly, and addresses marketing-related issues (SEO, Tracking, Copywriting, etc).

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