When using Hugo with [GitHub Pages](https://pages.github.com/), you can provide your own template for a [custom 404 error page](https://docs.github.com/en/pages/getting-started-with-github-pages/creating-a-custom-404-page-for-your-github-pages-site) by creating a 404.html template file in the root of your `layouts` folder. When Hugo generates your site, the `404.html` file will be placed in the root.
Your 404.html file can be set to load automatically when a visitor enters a mistaken URL path, dependent upon the web serving environment you are using. For example:
* [GitHub Pages](/hosting-and-deployment/hosting-on-github/) and [GitLab Pages](/hosting-and-deployment/hosting-on-gitlab/). The 404 page is automatic.
* Nginx. You might specify `error_page 404 /404.html;` in your `nginx.conf` file. [Details here](https://nginx.org/en/docs/http/ngx_http_core_module.html#error_page).
* Amazon CloudFront. You can specify the page in the Error Pages section in the CloudFront Console. [Details here](https://docs.aws.amazon.com/AmazonCloudFront/latest/DeveloperGuide/custom-error-pages.html)
* Caddy Server. Use the `handle_errors` directive to specify error pages for one or more status codes. [Details here](https://caddyserver.com/docs/caddyfile/directives/handle_errors)
* Azure Static Web App. set `responseOverrides.404.rewrite` and `responseOverrides.404.statusCode` in configfile `staticwebapp.config.json`. [Details here](https://docs.microsoft.com/en-us/azure/static-web-apps/configuration#response-overrides)
* Azure Storage as Static Web Site Hosting. You can specify the `Error document path` in the Static website configuration page of the Azure portal. [Details here](https://docs.microsoft.com/en-us/azure/storage/blobs/storage-blob-static-website).
* DigitalOcean App Platform. You can specify `error_document` in your app specification file or use control panel to set up error document. [Details here](https://docs.digitalocean.com/products/app-platform/how-to/manage-static-sites/#configure-a-static-site).
* [Firebase Hosting](https://firebase.google.com/docs/hosting/full-config#404): `/404.html` automatically gets used as the 404 page.