To test your custom error page, you need to simulate the specific error you've customized. For example, if you've created a custom 404 (Page Not Found) error page, simply try visiting a non-existent URL on your site. If the setup is correct, your custom page should appear instead of the default error message.
You can test other error types (e.g. 403 or 500) by triggering them manually through your site’s configuration or restricted access.
Make sure all content on your error page—such as images, links, and styling—loads properly and matches your website’s overall design.
For more help, see our tutorial: How do I configure custom error pages using cPanel?
