When you create and deploy a static html website on Azure static web apps, the 404 page will show a default Azure 404 page. Here is the code to change this page to a custom 404 page.

Create a custom 404 page on an Azure static web app.

Create file staticwebapp.config.json in the root of your website.

Enter this json:

  "responseOverrides": {
    "404": {
      "rewrite": "/404.html",
      "statusCode": 404

Create 404.html with your custom error.

Written by Loek van den Ouweland on 2021-08-09.
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