Introduction
This guide explains what a WordPress 404 error is, why it happens, and how to fix it. It is designed for WordPress site owners, administrators, and anyone troubleshooting missing pages. You’ll learn the most common causes, step-by-step solutions, and best practices to prevent future 404 errors.
Content
What Does 404 Error Mean and What Causes It?
“The page cannot be found”
“We can’t find the page you’re looking for.”
“The requested URL was not found on this server.”
“Not Found”
“HTTP Error 404”
“Error 404”
“404 Not Found”
A 404 means the requested page cannot be found. Most WordPress 404 errors are caused by broken permalinks, a corrupted .htaccess file, or conflicts with plugins. In practice, the visitor sees an error message like “404 Not Found” instead of the page they expected.
Permalinks are the permanent URLs to your posts and pages. A corrupted .htaccess file is a configuration file that controls how URLs are handled on your server. Plugin conflicts occur when two or more plugins interfere with each other or with WordPress core functionality.
This often happens after URL changes, deleted posts without redirects, or a faulty plugin or theme update that corrupts the site’s URL structure. If permalink fixes do not work, include server-level checks like expired SSL certificates or DNS misconfigurations in your troubleshooting steps.
How to Fix WordPress Posts Returning 404 Error
Save Permalinks to Fix WordPress Error 404
Most users can fix this in the wordpress dashboard by going to Settings >> Permalinks and using the Save Changes button without changing the original setting, which forces WordPress to rebuild the .htaccess file.
Then click save to rebuild the htaccess file and refresh WordPress routing. If the error page still appears, clear your browser cache and purge any server or plugin caches, since cached browser data or server plugins can keep serving an old 404 error message after the underlying fix.
Manually Reset Permalinks
If saving permalinks does not fix the issue, the next step is to manually reset the .htaccess file to the default WordPress rewrite rules, since a corrupted .htaccess file can trigger a wordpress 404 error, and in stubborn cases you may benefit from ongoing WordPress support and maintenance plans to keep your site stable. Before saving the new file, double check the replacement rewrite rules and the file path.
Before editing, create a backup copy of the file, then delete and replace the damaged version if needed, checking the wordpress installation location first.
On Nginx servers, there is no .htaccess file, so you may need help from your hosting provider instead, and the hosting support team may need to verify server configuration when the issue is not in WordPress itself, or from specialized theme experts such as professional Enfold theme support if your issue is tied to a specific design.
Reset permalinks when your site is in the main domain
Reset permalinks if your site is in a subdomain and fix WordPress 404 Error
Reset permalinks when your site is in a subdirectory
Request Professional Help
If the above steps do not resolve the issue, consider reaching out to expert WordPress support services like FixRunner for professional assistance, or contact your hosting support team if the problem appears to involve server-related issues beyond WordPress files or settings.
How to Monitor 404 Error on Your Website
Google Search Console
Google Search Console provides a free and accurate way to monitor 404 errors by showing URLs Google tried to crawl but returned a 404 error; in the interface, you can click Pages to review the affected URLs, and you can also use tools that rely on WordPress page and post IDs to target specific content for fixes.
Google Analytics
Use Google Analytics to track user behavior and identify pages with high exit rates that may correspond to 404 errors, similar to how you would diagnose admin-side issues like WordPress screen options not working by watching how the dashboard behaves.
WordPress Plugin
Plugins like Redirection log 404 errors in real-time and allow you to manage redirects directly from your WordPress admin page; a dedicated redirect plugin can also help monitor 404 logs and create redirects for broken links, but you should also understand how WordPress plugins work and how to manage them safely. A redirect plugin can also override individual URLs, so review any misconfigured rules during troubleshooting.
Ahrefs (or any Third-Party Audit Tool)
Tools like Ahrefs can crawl your whole site to find broken links and 404 errors, helping you keep your site clean.
Fix WordPress wp-admin or Login Page 404 Error <a name=”wpadmin404″></a>
A 404 error on your WordPress admin or login page (wp-admin page) typically happens when the server cannot find the wp-login.php file or the /wp-admin directory. This can be due to mistyped URLs, plugin conflicts, corrupted .htaccess files, or unauthorized changes from a security breach.
How to Fix wp-admin 404 Error
Deactivate all plugins via FTP: Rename the plugins folder in the wp-content folder to deactivate all plugins (or use your hosting file manager if FTP is unavailable). If the login screen appears, a plugin conflict is the cause.
Replace your .htaccess file: Restore the .htaccess file to the default WordPress rewrite rules to fix corrupted rules blocking the login page.
Update Site URLs in wp-config.php: Add the correct WordPress Address (URL) and Site Address (URL) to your wp-config.php file to fix incorrect URL settings.
Switch to a default theme: Rename your active theme folder in wp-content/themes to force WordPress to use a default WordPress theme, which can resolve theme-related conflicts; test this on a staging environment first when possible, since a broken theme can also affect the login URL.
Reset file permissions: Ensure wp-login.php and the wp-admin folder have correct permissions, including folder permissions typically set to 755 and files set to 644. If your admin area appears but shows a blank page instead of the dashboard, follow a dedicated guide on fixing a blank WordPress admin panel to troubleshoot further.
If these steps do not work, consult your hosting provider or professional WordPress support services.
Create a Custom 404 Page in WordPress <a name=”custom404″></a>
Even after fixing 404 errors, some visitors will land on broken URLs. A custom 404 page improves user experience by providing helpful content instead of a generic error, especially when combined with troubleshooting for issues like the WordPress Customizer not working that can affect how your error pages look.
How to Create a Custom 404 Page
Use your theme’s built-in 404 page: Most modern WordPress themes include a built-in 404 page you can customize in the WordPress Customizer, including the message and layout.
Use a plugin: Install a 404 page plugin to select or create a custom page with a search bar, popular posts, and a friendly message; for many users, this is a zero code option.
Edit your theme’s 404.php file: If your theme does not include a custom error page, you can create one by editing the 404.php file in your active theme directory, which is the template file WordPress uses for the error page, to add custom HTML, search bars, or links.
What to Include on Your Custom 404 Page
A search bar to help visitors find content, so a broken link doesn’t feel like a dead end.
Links to popular posts or categories to retain visitors by guiding them to relevant content instead of leaving the site.
A friendly message explaining the error and guiding users.
A button to return to the homepage.
Optional contact forms or chat widgets for user assistance.
How to Prevent 404 Errors in WordPress <a name=”prevent”></a>
Preventing 404 errors helps maintain SEO and user experience, just as promptly fixing issues like broken images in WordPress protects your site’s appearance and search performance.
Always set up 301 redirects when changing or removing a URL by sending the old url to a relevant new page, which helps protect rankings and provide a better user experience.
Regularly audit your site for 404 errors via Google Search Console and access logs.
Keep WordPress, themes, and plugins updated to avoid conflicts causing URL issues.
Use a default theme or well-coded active theme to minimize template errors, and if a faulty theme locks you out of the dashboard, you can disable a WordPress theme using FTP to regain access.
Clear browser and server caches regularly to prevent serving outdated 404 pages.
Be cautious during site redesigns or migrations by mapping old URLs to new ones and setting up redirects in advance.
Use a staging environment to test changes before pushing them live.
Frequently Asked Questions
What is the WordPress Error 404 Page Not Found?
A 404 error means the requested page cannot be found on your server, resulting in an error message instead of the content.
How can I fix a 404 error on WordPress?
Check permalinks under Settings >> Permalinks and save changes to rebuild routing. Clear browser and server caches. Use plugins like Redirection to manage broken links. Restore deleted pages from backups if needed, and properly remove or delete problematic WordPress plugins that might be causing 404 errors.
Why is it important to fix the WordPress Error 404 Page Not Found?
Fixing 404 errors improves user experience, helps SEO rankings, and ensures accurate website analytics.
How can I prevent 404 errors on WordPress?
Regularly audit for broken links, set up redirects for changed URLs, keep your site updated, use a default theme, clear caches, and plan URL changes carefully.
What if I can’t fix a 404 error on my WordPress site?
Check for server-level issues, inspect files via FTP, consult hosting support, use debugging tools, or hire comprehensive WordPress support services.
What causes a 404 error on the wp-admin or login page?
Common causes include missing or corrupted wp-login.php file, plugin conflicts, corrupted .htaccess file, incorrect site URL settings, or theme conflicts.
How do I fix a 404 error on the wp-admin login page?
Deactivate plugins via FTP, restore .htaccess file, update site URLs in wp-config.php, switch to a default theme, and reset file permissions.
How Can You Use This Information?
By understanding and addressing WordPress 404 errors, you can maintain a healthy website, protect SEO, and provide a better experience for your visitors. Regular monitoring and professional support, backed by strong reviews of FixRunner’s WordPress support, ensure your site runs smoothly without interruptions.