---
title: "Add Custom Domains in App Platform | Hostman Docs"
description: "Add a custom domain to your app in App Platform, use the free technical domain, and remove domains you no longer need. Free SSL included."
---

> For the complete documentation index for AI agents, see [llms.txt](https://hostman.com/llms.txt).

Every app in App Platform gets a free technical domain, and you can add your own custom domains. App Platform automatically issues a free Let's Encrypt SSL certificate for each domain.

## Technical Domain

When you create an app, App Platform assigns a free technical domain to it and issues a Let's Encrypt SSL certificate.

-   **Frontend apps**: the app becomes available on this domain as soon as the first deploy completes, so you can test it right away.
-   **Backend apps**: use the technical domain for testing and in production, for direct requests to the app.

## Add a Custom Domain

> [!NOTE]
> Adding a domain triggers a redeployment of your app. 

You can add any number of domains to a single app. App Platform automatically issues a free Let's Encrypt SSL certificate for each custom domain and renews it one week before it expires. To use your own certificate instead, see Configure a Custom SSL Certificate.

Before you start, check where the domain's DNS is managed. To manage it in Hostman, point the domain to the Hostman nameservers:

```shell
ns1.hostman.com
ns2.hostman.com
```

To add a domain to your app:

1.  Go to **App Platform** and select your app.
2.  Open the **Settings** tab.
3.  In the **Domains** section, click **Edit**.
4.  Choose how to add the domain:
    -   If the domain uses Hostman nameservers, select it from the list.
    -   If the domain's DNS is managed by another provider:
        1.  Select **External domain** and enter the domain name.
        2.  At your DNS provider, add the A record shown in the dialog.
        3.  Wait for the DNS changes to propagate. This can take some time.
5.  Click **Save**.

## Remove a Domain

Removing a domain triggers a redeploy of your app.

To remove a domain:

1.  Go to **App Platform** and select your app.
2.  Open the **Settings** tab.
3.  In the **Domains** section, click **Edit**.
4.  Click the X icon next to the domain.