A 404 error in WordPress is a frequent issue for site owners, indicating to users and search engines that a page they are trying to access doesn’t exist. If not resolved, these errors can lead to lost traffic, a poor user experience, and lower SEO rankings. This guide details the causes of 404 errors in WordPress and provides step-by-step solutions to fix them permanently.
### What Is a 404 Error in WordPress?
A 404 Not Found error is an HTTP status code indicating the server couldn’t locate the requested resource. In WordPress, this could be a page, post, image, or file that has either been deleted, moved, or never existed. The 404 error is a client-side error, meaning the request reached the server, but the server couldn’t find the requested item.
### Common Causes of 404 Errors in WordPress
#### 1. Broken or Changed Permalink Structure
The most common cause of 404 errors in WordPress is a corrupted or recently changed permalink structure. WordPress uses .htaccess rules to map URLs to PHP files. If these rules are incorrect or missing, all pages except the homepage might return a 404 error.
#### 2. Deleted or Moved Content
Deleting a page or post, changing its slug, or restructuring your site’s URL hierarchy can lead to 404 errors. This often occurs after site migrations, redesigns, or content cleanups.
#### 3. Missing or Corrupt .htaccess File
WordPress relies on the .htaccess file for URL rewriting. If this file is missing, corrupted, or contains incorrect rules, it can cause 404 errors across your site.
#### 4. Plugin or Theme Conflict
Some plugins, especially SEO, custom post type, and security plugins, register custom URL patterns. Conflicting URL rules or deactivated plugins without proper cleanup can cause 404 errors.
#### 5. Wrong File Permissions
Incorrect file permissions can prevent the web server from reading the .htaccess file or accessing certain content, resulting in 404 errors.
### How to Fix 404 Errors in WordPress — Step by Step
#### Fix 1: Flush Permalinks
This resolves most WordPress 404 errors caused by permalink issues. In your WordPress dashboard, go to Settings → Permalinks and click Save Changes without altering anything. This regenerates your .htaccess file and resets URL routing rules.
#### Fix 2: Check and Recreate the .htaccess File
If flushing permalinks doesn’t work, the .htaccess file might be the issue. Connect to your server via FTP and check your root directory. If the .htaccess file is missing or corrupted, create a new one with default WordPress content.
#### Fix 3: Set Up 301 Redirects for Changed URLs
Set up 301 redirects from old URLs to new ones if pages have been moved or deleted. Use plugins like Redirection or Rank Math’s redirect manager to handle this easily.
#### Fix 4: Deactivate Conflicting Plugins
If specific URLs return 404 errors, a plugin conflict might be the cause. Deactivate plugins one at a time, flush permalinks after each, and test the 404 URL.
#### Fix 5: Check Your WordPress Database
If a page shows as published but still returns a 404, try updating the post in the editor to resave the data and flush its cached URL.
#### Fix 6: Check File Permissions
Ensure WordPress files and directories have the correct permissions: 644 for files and 755 for directories.
### How to Find All 404 Errors on Your WordPress Site
Use Google Search Console to find 404 errors on your site. It reports all URLs that Google has tried to crawl and found returning 404 errors. You can also use the Broken Link Checker plugin or tools like Screaming Frog to identify 404 URLs.
### Customizing Your 404 Page in WordPress
A well-designed 404 page can reduce bounce rates and keep visitors engaged. Customize your theme’s 404.php template to include a search bar, links to popular posts, or your main navigation.
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