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404 Not Found

The HTTP 404 Not Found client error response code indicates that the server can't find the requested resource. Links that lead to a 404 page are often called broken or dead links and can be subject to link rot.

A 404 status code does not indicate whether the resource is temporarily or permanently missing. But if a resource is permanently removed, a 410 (Gone) should be used instead of a 404 status.

Status

404 Not Found

Custom error pages

Many web sites customize the look of a 404 page to be more helpful to the user and provide guidance on what to do next. Apache servers can be configured using an .htaccess file and a code snippet like the following example.

ErrorDocument 404 /notfound.html

For an example of a custom 404 page, see MDN's 404 page.

Custom design is a good thing, in moderation. Feel free to make your 404 page humorous and human, but don't confuse your users.

Specifications

Specification Title
RFC 7231, section 6.5.4: 404 Not Found Hypertext Transfer Protocol (HTTP/1.1): Semantics and Content

Browser compatibilityUpdate compatibility data on GitHub

Desktop
Chrome Edge Firefox Internet Explorer Opera Safari
404 Yes 12 Yes Yes Yes Yes
Mobile
Android webview Chrome for Android Firefox for Android Opera for Android Safari on iOS Samsung Internet
404 Yes Yes Yes Yes Yes Yes

See also

© 2005–2020 Mozilla and individual contributors.
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/HTTP/Status/404