michaeltyson

Leon Stafford

Save your visitors from unhelpful 404 errors!
Instead of quickly giving up when a visitor reaches content that doesn’t exist, make an effort to guess what they were 
after in the first place. This plugin will perform a search of your posts, pages, tags and categories, using keywords from the requested 
URL. If there’s a match, redirect to that content instead of showing the error. If there’s more than one match, the 
404 template can use some template tags to provide a list of suggestions to the visitor.
See the <a href="http://michael.tyson.id.au/smart-404" rel="nofollow ugc">Smart 404 homepage</a> for more information.
<h3>Template tags</h3>
<code>smart404_has_suggestions</code>
Returns true if there are some suggestions, false otherwise
<code>smart404_get_suggestions</code>
Retrieve an array of post objects for rendering manually.
<code>smart404_suggestions</code>
Draw a list of suggested posts.
Pass the parameter “list” to render suggestions as a list.
<code>smart404_loop</code>
Query posts for use in a Loop. Eg:
<pre><code><?php smart404_loop(); ?>
<?php while (have_posts()) : the_post(); ?>
 <h2><a href="<?php the_permalink() ?>"><?php the_title(); ?></a></h2>
 <?php the_excerpt(); ?>
<?php endwhile; ?>
</code></pre>
Note that the loop will not display pages correctly, as it is not built to support them. It is recommended that if you use 
a loop like that above, do not enable searching of pages.
<code>smart404_get_search_terms</code>
Retrieve an array of search terms used to populate the suggestions list, for use with contextual highlighting, etc.
For support and latest source code, please visit https://github.com/leonstafford/smart-404

Smart 404

Automatically redirect to the content the user was most likely after, or show suggestions, instead of showing an unhelpful 404 error.

wp-buy

osama.esh

Adam Salah

By this plugin you can fix all random 404 links appear in you your website and redirect them to homepage or any other page using 301 SEO redirect. 404 error pages hurts the rank of your site in search engines. This smart plugin is a simple solution to handle 404 error pages.
Elevate your website’s SEO performance and user experience with our Smart 404 Error Fix & Redirect plugin. This powerful tool automatically identifies and manages random 404 errors on your WordPress site, ensuring that broken links and missing pages are seamlessly redirected. By handling these 404 errors with precision, the plugin directs visitors to your homepage or any other specified page, helping to retain your audience and improve site navigation.
<h3>Features</h3>
<ul>
<li>Automatic 404 Redirection: Effortlessly manage broken links and redirect users to relevant pages.</li>
<li>301 SEO Redirects: Implement permanent 301 redirects to enhance your website’s SEO ranking and preserve link equity.</li>
<li>Customizable Redirection: Choose where 404 errors should be redirected – to your homepage, a custom page, or any URL of your choice.</li>
<li>Soft 404 Handling: Address and manage soft 404 errors effectively.</li>
<li>Broken Link Management: Detect and fix broken images and links to maintain a smooth user experience.</li>
<li>HTTPS Support: Ensure compatibility with HTTPS for secure redirection.</li>
</ul>
<h3>Benefits</h3>
<ul>
<li>Improved SEO: Reduce the negative impact of 404 errors on your search engine rankings with effective 301 redirects.</li>
<li>Enhanced User Experience: Keep visitors engaged by preventing them from encountering error pages.</li>
<li>Easy Setup: Simple installation and configuration with user-friendly options.</li>
</ul>
How to use the plugin?
<ul>
<li>After installing the plugin go to the plugin control panel from settings menu.</li>
<li>Put the link where the plugin should redirect all 404 links in the text box.</li>
<li>Select the plugin status to be enabled.</li>
<li>Click the button Update Options to save the from.</li>
<li>Go to 404 URLs tab to see the latest 404 links discovered and redirected</li>
</ul>
Note 
Please make sure than the page you put above in the control panel to redirect all 404 to it is a valid link. If this page is not valid it will be considered as an 404 link and will result in redirect loop. In case of redirect loop you can simply disable the plugin and check the page is valid or not.

All 404 Redirect to Homepage

Just another upsell plugin. Deleted it after two weeks.

Just another upsell plugin

Using this plugin, you can fix all 404 error links by redirecting them to homepage using the SEO 301 redirection. Improve your SEO rank & pages speed

Smart 404 vs All 404 Redirect to Homepage