MaximeB

<p>This plugin will check if there are some hidden meta tags with noindex and warns the author of the article. The warning is only visible for the author of the post, or the admin(s).</p>
<p><strong>Features :</strong></p>
<ul>
<li>Check the content of a post and detect the presence of meta tags with robots/noindex in it.</li>
</ul>


Better noindex

Warns the author or admin in case of <meta name="robots" content="noindex"> hidden in a post.

Rahul Mondal

<p>No-Indexer is a WordPress plugin that allows you to add a checkbox in all page and post settings sidebar to set a noindex meta tag for specific pages and also the pages exclude from robots.txt and sitemap.xml.</p>
<h3>Usage</h3>
<ol>
<li>After activating the plugin, go to the edit page screen for any page.</li>
<li>In the page settings sidebar, you will find a checkbox labeled “Noindex this page”.</li>
<li>Check the checkbox if you want to add a noindex meta tag to the page.</li>
<li>Update or publish the page to apply the changes.</li>
</ol>


No-Indexer

Add a checkbox in page, post, and custom type settings to instruct search engines not to index the content, excluding it from robots.txt and sitemap.

Better noindex vs No-Indexer