Custom Domains on Render

You can apply your own custom domains to Render web services and static sites. Services with a custom domain also keep their onrender.com subdomain.

Render automatically creates and renews TLS certificates for all custom domains, including wildcard domains. All HTTP traffic to a custom domain is automatically redirected to HTTPS.

Apply a custom domain in three steps:

1. Add your domain in the Render Dasard.
2. Configure DNS with your domain's provider.
3. Verify your domain in the Render Dasard.

These steps are detailed below.

1. Add your domain in the Render Dasard

1. In the Render Dasard, select the service that will use your custom domain.

   • Only web services and static sites support custom domains.

2. Open the service's Settings page and scroll down to the Custom Domains section:

   

3. Click + Add Custom Domain and provide your custom domain name.

   If your domain includes Unicode characters, first convert it to Punycode with a tool like Punycoder.

   For example, you would provide ëxample.com as xn--xample-ova.com.

4. Click Save. Your custom domain now appears in the list:

   

   • If you add a www subdomain (e.g., www.example.org), Render automatically adds the corresponding root domain and redirects it to the www subdomain. This is shown in the screenshot above.

   • If you add a root domain (e.g., example.org), Render automatically adds the corresponding www subdomain and redirects it to the root domain.

Your domain does not yet point to your service! Next, you'll configure DNS.

2. Configure DNS with your provider

1. Log in to your custom domain's DNS provider (such as Cloudflare, Namecheap, or GoDaddy).

2. Navigate to the DNS settings for your domain.

3. Add DNS records for your domain based on your provider, then return here:

   • Cloudflare
   • Namecheap
   • All other providers

   If you're adding a wildcard domain, see additional instructions.

4. Return to the Render Dasard and verify your domain.

3. Verify your domain

1. Return to your service's Custom Domains settings in the Render Dasard:

   

2. Click the Verify button next to your custom domain.

   • If verification fails, your DNS settings might not have propagated yet. Wait a few minutes and try again. See also Speeding up domain verification.

3. If verification succeeds, Render issues a TLS certificate for your domain and updates the verification status:

   

4. Try visiting your custom domain in a browser.

   • If you see a 502 Bad Gateway error, Render might still be updating routing rules for your service. Wait a few minutes and try again.

5. When your custom domain loads successfully, you're good to go!

Speeding up domain verification

We recommend removing cached entries in public DNS servers after updating your DNS records. This is especially important if you're updating nameservers for your domains. Clearing the cache will speed up DNS verification and TLS certificate issuance for your domains.

Use the links below to clear cached records in popular public DNS servers:

• Flush Google Public DNS Cache
• Purge Cloudflare Public DNS Cache
• Refresh OpenDNS Cache

Advanced DNS configuration

Wildcard domains

You can apply a wildcard domain (e.g., *.example.org) to a Render service to point all matching subdomains (docs.example.org, blog.example.org, etc.) to it:

This configuration requires setting three CNAME DNS records with your provider:

Using Cloudflare DNS with wildcard domains

If you manage your custom domain with Cloudflare DNS, note the following:

If you add a wildcard domain (e.g., *.example.com) to Render but not the corresponding root domain (e.g., example.com), using Cloudflare with proxying enabled (orange cloud) will cause traffic for the root domain to be sent to the same Render destination as your wildcard domain.

To prevent service disruptions, make sure to disable proxying for your root domain (gray cloud). If you have any questions, please get in touch at [email protected].

CAA records

If your custom domain defines CAA records, make sure to define records for Render's certificate authorities:

• Let's Encrypt (letsencrypt.org)
• Google Trust Services (pki.goog; cansignhttpexchanges=yes)

Additionally, if you add a wildcard domain, make sure to define corresponding issuewild records for each authority.

example.com IN CAA 0 issue "letsencrypt.org"
example.com IN CAA 0 issuewild "letsencrypt.org"
example.com IN CAA 0 issue "pki.goog; cansignhttpexchanges=yes"
example.com IN CAA 0 issuewild "pki.goog; cansignhttpexchanges=yes"