Choosing a subdomain

Please follow the steps to set a custom domain in this order:
1.​Choosing a subdomain (you are here)
2.​Deciding where to set the custom domain​
3.​Initiating the custom domain setup (at the organization, collection, or space level)
4.​Configuring DNS​
5.​Confirming the custom domain setup​
Only subdomains can be used to serve your GitBook documentation. It's not possible to use an apex domain.
Here are some examples of what you could and could not choose — just replace example.com with your own domain:
Domain type
Example
Supported?
Apex domain
example.com
❌
www subdomain
www.example.com
✅
Custom subdomain
docs.example.com
help.example.com
anything.example.com
✅
Once you have chosen your custom domain, you're ready to move onto the next step: deciding where to set the custom domain.

Domain type	Example	Supported?
Apex domain	`example.com`	❌
`www` subdomain	`www.example.com`	✅
Custom subdomain	`docs.example.com` `help.example.com` `anything.example.com`	✅

Last modified 3mo ago