TL;DR: Fix Error 404 in WordPress using Yoast SEO by resaving your permalink structure and configuring the 404 handling settings. This ensures search engines find correct URLs without manual redirects.
Why 404 Errors Occur
A 404 Not Found error appears when a user attempts to access a web page that does not exist on your server. This often happens after changing permalink structures, deleting posts, or migrating sites. Yoast SEO is a powerful tool that can help manage these issues effectively through its built-in features and configuration options.
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Step 1: Resave Permalinks
The most common fix for unexpected 404 errors is refreshing your permalink structure. Go to your WordPress Dashboard, navigate to Settings, and then click on Permalinks. You do not need to change the actual structure. Simply click the “Save Changes” button at the bottom of the page. This action regenerates the .htaccess file, which often resolves routing issues immediately. This step is crucial because it forces WordPress to rebuild the rewrite rules that map URLs to your content.
Step 2: Configure Yoast SEO Settings
Next, install and activate the Yoast SEO plugin if you haven’t already. Once active, go to Yoast SEO in your dashboard menu. Click on Tools, then select File Editor. Ensure that the .htaccess file is selected. Look for any custom redirect rules you may have added previously. If you see broken links or incorrect paths, correct them or remove them. Yoast also offers a Redirection manager in the premium version, which allows you to set up automatic 301 redirects for missing pages.
Step 3: Clear Caches
After making changes, clear all caching layers. This includes your browser cache, any server-side caching plugins like WP Rocket, and CDN caches like Cloudflare. Cached pages might still show the old error status even after you have fixed the underlying issue. Clearing caches ensures that visitors see the updated, correct version of your site.
Tips for Prevention
Always use custom URLs for new posts instead of relying on default date-based structures. This prevents future 404 errors when you update old content. Regularly check your Yoast SEO dashboard for crawl errors and fix them promptly. Use the Redirection tool to monitor broken links and fix them before they impact user experience.
FAQ
Q: Why does resaving permalinks fix 404 errors?
A: It regenerates the .htaccess file and refreshes WordPress rewrite rules.
Q: Do I need the premium version of Yoast SEO?
A: No, basic 404 fixes work with the free version via permalinks.
Q: How long does it take for fixes to apply?
A: Changes usually apply immediately after clearing all site and browser caches.