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Blaxel allows you to connect your own domain names to your Blaxel workspace to use when exposing resources. You can also share a verified preview custom domain with another workspace in the same account. The target workspace can use the shared domain for its own previews, while the shared copy stays read-only. When you register a domain, you also enable the use of wildcard subdomains for that domain. For example:
  • If you register mycompany.com, you can use any *.mycompany.com subdomain to create custom URLs.
  • If you register preview.mycompany.com, you can use any *.preview.mycompany.com subdomain to create custom URLs.
  • And so on.
Each domain is uniquely assigned to a region. For example, if preview.mycompany.com is registered in region us-pdx-1, it is not possible to use it in region eu-lon-1 (for example) or any other region. In the Blaxel Console, navigate to Network > Custom Domains in the sidebar and add a new custom domain. Then, you’ll need to configure DNS records with your domain provider. Finally, verify from within Blaxel: after DNS propagation completes, your custom domain will become fully usable. image.webp

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Share a custom domain

After you verify a preview custom domain, you can share it with another workspace in the same account.
  • Use a workspace share when one target workspace should get a read-only copy
  • Use an account share when every workspace in the account should be able to use the domain
  • Create previews from the target workspace after the share is in place
Only verified preview custom domains can be shared.
When a target workspace binds a preview to the shared domain, the full host still needs to be unique across the account. If another workspace already uses the same <prefixUrl>.<domain> host, Blaxel returns 409.

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Use a custom domain

Custom domains can currently be used for: Related pages:

Sandbox preview URLs

Create preview URLs and configure fallback routing for custom domains.

Changelog

Review recent platform updates related to custom domains and previews.
Last modified on July 14, 2026