hugo/docs/content/en/templates/404.md

title	linkTitle	description	categories	keywords	weight
Custom 404 page	404 templates	Create a template to render a 404 error page.			190

To render a 404 error page in the root of your site, create a 404 template in the root of the layouts directory. For example:

{{ define "main" }}
  <h1>404 Not Found</h1>
  <p>The page you requested cannot be found.</p>
  <p>
    <a href="{{ .Site.Home.RelPermalink }}">
      Return to the home page
    </a>
  </p>
{{ end }}

For multilingual sites, add the language key to the file name:

layouts/
├── 404.de.html
├── 404.en.html
└── 404.fr.html

Your production server redirects the browser to the 404 page when a page is not found. Capabilities and configuration vary by host.

Host	Capabilities and configuration
Amazon CloudFront	See details.
Amazon S3	See details.
Apache	See details.
Azure Static Web Apps	See details.
Azure Storage	See details.
Caddy	See details.
Cloudflare Pages	See details.
DigitalOcean App Platform	See details.
Firebase	See details.
GitHub Pages	Redirection to is automatic and not configurable.
GitLab Pages	See details.
NGINX	See details.
Netlify	See details.