Error 404 indicates that the server cannot find the requested page. This happens when the URL points to a resource that does not exist or is no longer available.
Table of Contents
What Error 404 means
When a 404 error appears:
- the server is reachable
- the requested page is missing
- no matching resource exists at that address
It is one of the most common HTTP errors on the web.
Common causes
1. Incorrect URL
The address may contain:
- a typo
- missing characters
- incorrect structure
2. Page has been removed
The content may have been:
- deleted
- moved without redirection
- replaced by a new structure
3. Broken internal or external links
A link may point to:
- an outdated page
- an incorrect path
- a removed resource
4. Changes in website structure
Redesigns or migrations can change URLs without proper redirects.
How to resolve or check the issue
- verify the URL for spelling errors
- navigate to the homepage and search for the content
- use the website’s navigation or search function
- check if the page has been moved to a new address
For website administrators
If you manage the site:
- set up a redirect (301) to the correct page when possible
- update internal links pointing to the missing page
- inform linking websites if external links are broken
Practical implications
A 404 error does not indicate a server problem. It simply means the requested content is not available at the given address.
Summary
Error 404 occurs when a requested page cannot be found on the server, usually due to incorrect URLs, deleted content, or changed site structure, and is typically resolved by correcting links or implementing redirects.