You click a link expecting a webpage, but an error appears saying the page is unavailable.

The message usually looks like “404 Not Found.”

This error is an HTTP status code sent by the website’s server to the browser. The browser then displays this code.

Why Does a 404 Error Happen?

A 404 error usually occurs when a webpage is removed or moved to a new URL. Other reasons include:

• Someone removed or moved the file, image, or page but didn’t update the link.

• You typed the URL wrong, linked it incorrectly, or misconfigured it during a website update.

• The server stopped working, or the connection broke.

• The domain name cannot be converted into an IP address by the DNS.

• The domain name no longer exists.

Dead links remain online for a long because site owners often don’t know if the content has moved or been deleted.

Some pages still appear in search results even when they are no longer available. 

Blogs and news sites might not know when a page changes or gets removed. Many website owners do not review external links, so a valid link can stop working later.

How to Fix a 404 Error

A 404 error means visitors cannot access the page they want.

However, this does not always mean the content is completely gone. In many cases, the issue is easy to fix.

Here are some ways to solve it:

• Refresh the Page – The page may not have loaded correctly. Try clicking the “Refresh” button or pressing F5.

• Check the URL – If you typed the address manually or clicked a link, there might be a mistake. Look for spelling errors or missing slashes.

• Go Back in the Directory – If a URL like example.com/folder1/folder2/page gives a 404 error, try removing the last section (folder2/page) to see if a working link appears.

• Use the Site’s Search – Many websites have a search bar. Enter keywords to find the page.

• Search on Google – If the site has moved, search for it using the website name and topic.

• Clear Browser Cache and Cookies – Clear the cache and cookies if the error happens only on one device.

• Contact the Website – Check the “Contact Us” page. If nothing works, The website owner may tell you if the page still exists or has a new URL. They might also add a redirect to fix the issue.

HTTP 404 Errors Can Harm a Website’s Ranking and Trust

Google and Bing rank websites lower when they have many errors.

Crawlers find multiple pages with 404 codes and consider the site poorly managed.

Broken links reduce rankings, and Google may remove the site from search results if too many 404 pages appear. A high number of errors can significantly decrease traffic.

A site loses a visitor’s trust when several links fail, or the landing page fails to open.

If this problem occurs frequently, users might stop looking since they do not know if the content they need still exists.

Finding 404 Errors on Your Website

Site owners must repair HTTP 404 pages. Internal 404 errors appear on their site, while external ones appear on other websites.

Many free tools help find broken links. Some widely used options are:

• Google Search Console: If you have a Google account and registered your site, you can use Google Search Console. It shows 404 errors found by Google’s crawler, and you can mark them as fixed. Other features help check robots.txt errors and view crawling statistics.

• Dead Link Checker: This tool quickly finds internal and external broken links. Enter the website URL and start the scan. You can check a single page or an entire site. The tool lists all fractured links with their status codes and URLs.

• W3C Link Checker: Created by the World Wide Web Consortium (W3C), this tool thoroughly checks web pages but takes more time than other tools. Like Dead Link Checker, you enter a URL, and it scans for broken links. You can also add extra details for a more in-depth analysis.

Making a 404 Error Page

Some content management systems (CMS), such as WordPress, Joomla, and Drupal, automatically create a 404 error page when a webpage is missing.

The default HTTP 404 page shows a basic error message. 

However, many CMS platforms allow customization with unique extensions.

Setting it up can be more challenging if your CMS does not support editing, creating a 404 page, or if your site runs only on HTML or PHP.

Follow these steps to make one:

1. Make a file named ‘404.html’ or ‘404.php’ in the root directory if it does not exist.
2. Open the .htaccess file in the root directory. If there is none, create one. Add this line: ErrorDocument 404 /404.html, then save the file.
3. Test the setup by visiting a missing webpage. If done correctly, the browser should display your 404 error page.

Why Customize a 404 Error Page?

A simple 404 error page helps, but a custom one gives more advantages. It ensures users get the correct HTTP status code.

The page should show a ‘410 Gone’ message if the content no longer exists. The message informs users that the content no longer exists.

Second, a custom error page can include helpful links, such as the homepage or related pages.

Adding a search bar can also help users find what they need. These features may keep visitors on your site instead of leaving it immediately.

A creative 404 page can also improve user experience. Visitors may feel frustrated when they reach an error page, but a unique or humorous message can lighten the mood.

A well-designed error page that fits your website’s style improves the experience. If visitors enjoy the page, they may stay instead of leaving.