Samuel Aguilera

There are three possible scenarios where this plugin does something. In all cases, the attachment page must exists, the plugin will not run for deleted attachments:
A) A visitor lands on an attachment page and the parent post is available (not in trash or deleted). A 301 redirect will be issued to redirect the visitor to the parent post.
B) A visitor lands on an attachment page and the parent post was already deleted from trash. A 302 redirect is issued to home page (this can be changed to 301 if you want, see FAQ for more details).
C) A visitor lands on an attachment page and the parent post is in trash, therefore not available for the visitor. It returns a 404 error code to prevent endless redirection loop in old WP releases and redirecting to trashed/not available posts.
There is no options page, simply activate it and will do the job.
If you’re happy with the plugin <a href="https://wordpress.org/support/plugin/attachment-pages-redirect/reviews/?filter=5" rel="ugc">please don’t forget to give it a good rating</a>, it will motivate me to keep sharing and improving this plugin (and others).
<h4>Requirements</h4>
<ul>
<li>WordPress 4.8 or higher.</li>
</ul>

Attachment Pages Redirect

Redirect attachment pages or return a 404 error for them based on the parent post status.

Duck Dev

Joel James

If you care about your website, you should take steps to avoid 404 errors as it affects your SEO badly. 404 ( Page not found ) errors are common and we all hate it, even Search engines do the same! Install this plugin then sit back and relax. It will take care of 404 errors!
<h4>What is 404 to 301?</h4>
Handling 404 errors in your site should be easy. With this plugin, it finally is.
<blockquote>
<h4>404 to 301 Log Manager – Add-on is now available!</h4>
<ul>
<li>Instead of instant email alerts, get hourly, twice daily, daily, twice weekly, weekly alerts.</li>
<li>Limit the amount of emails sent out based on error logs count.</li>
<li>PDF file attachment of error logs will be delivered through the email.</li>
<li>Automatically clear old error logs based on time period.</li>
<li>Get email alerts to multiple email recipients.</li>
</ul>
<a href="https://duckdev.com/products/404-to-301-log-manager/" rel="nofollow ugc">Get this add-on now</a> | <a href="https://duckdev.com/support/docs/404-to-301-log-manager/" rel="nofollow ugc">See Docs</a>
</blockquote>
404 to 301 is a simple but amazing plugin which handles all 404 errors for you. It will redirect all 404 errors to any page that you set, using 301 (or any other) status. That means no more 404 errors! Even in Google webmaster tool you are safe! 
You will not see any 404 error reports in your webmaster tool dashboard.
<blockquote>
<h4>404 to 301 – Features</h4>
<ul>
<li>You can redirect errors to any existing page or custom link (globally).</li>
<li>You can set custom redirect for each 404 path!</li>
<li>No more 404 errors in your website. Seriously!</li>
<li>Translation ready!</li>
<li>You can optionally monitor/log all errors.</li>
<li>Exclude paths from errors.</li>
<li>You can optionally enable email notification on all 404 errors.</li>
<li>You can choose which redirect method to be used (301,302,307).</li>
<li>Will not irritate your visitors if they land on a non-existing page/url.</li>
<li>Increase your SEO by telling Google that all 404 pages are moved to some other page.</li>
<li>Completely free to use with lifetime updates.</li>
<li>Developer friendly.</li>
<li>Follows best WordPress coding standards.</li>
<li>Of course, available in <a href="https://github.com/joel-james/404-to-301" rel="nofollow ugc">GitHub</a></li>
</ul>
<a href="https://wordpress.org/plugins/404-to-301/installation/" rel="ugc">Installation</a> | <a href="https://duckdev.com/support/docs/404-to-301/" rel="nofollow ugc">Docs</a> | <a href="https://wordpress.org/plugins/404-to-301/screenshots/" rel="ugc">Screenshots</a>
</blockquote>
Bug Reports
Bug reports for 404 to 301 are always welcome. <a href="https://duckdev.com/support/" rel="nofollow ugc">Report here</a>.
More information
<ul>
<li><a href="https://duckdev.com/products/404-to-301" rel="nofollow ugc">404 to 301 – Plugin Homepage</a>, containing more details and docs.</li>
<li>Follow the developer <a href="https://twitter.com/Joel_James" rel="nofollow ugc">@Twitter</a></li>
<li>Other <a href="https://profiles.wordpress.org/joelcj91/#content-plugins" rel="nofollow ugc">WordPress plugins</a> by Joel James for <a href="https://duckdev.com" rel="nofollow ugc">Duck Dev</a></li>
</ul>
404 Errors and Redirect – More Details
If you are confused with these terms 404,301, redirect etc, <a href="https://moz.com/learn/seo/redirection/" rel="nofollow ugc">refer this page</a> to know more about the redirect and SEO.
<h4>Bug Reports</h4>
Bug reports for 404 to 301 are always welcome. <a href="https://duckdev.com/support/" rel="nofollow ugc">Report here</a>.

404 to 301 – Redirect, Log and Notify 404 Errors

Simple but powerful

Automatically redirect, log and notify all 404 page errors to any page using 301 redirect for SEO. No more 404 Errors in WebMaster tool.

Attachment Pages Redirect vs 404 to 301 – Redirect, Log and Notify 404 Errors