Alobaidi

<h3>Extend Link – Link Options for Editor</h3>
The Extend Link plugin Allows you to add classes, IDs, titles, rel attributes, and file download options to links directly from the “Extend Link” dialog in the Classic Editor and Classic Block in Gutenberg. It also provides H1–H6 support, so you can, for example, add an ID or classes to a heading. A lightweight, professional plugin, free and always will remain free!
<h3>Key Features</h3>
Enhanced Link Attributes: 
* Add custom CSS classes to links. 
* Assign unique IDs for precise targeting. 
* Add title attributes (tooltips on hover). 
* Set rel attributes: nofollow, noreferrer, noopener. 
* Open links in new tabs (target=”_blank”). 
* Enable file download instead of opening. 
* Check link status in real-time.
Heading Support (H1-H6): 
* Add IDs and classes directly to headings. 
* Insert fully-attributed links inside headings. 
* Edit existing heading attributes. 
* Perfect for creating anchor links.
Link Status Checker: 
* Verify if links are working or broken. 
* See HTTP status codes (200, 404, etc.). 
* Improve SEO by fixing dead links. 
* Built-in tool – no external service needed.
User Experience: 
* Seamless Classic Editor integration. 
* Compatible with Gutenberg Classic Block. 
* Intuitive dialog with helpful tooltips. 
* Visual feedback for all actions.
Professional & Lightweight: 
* All-in-one solution. 
* No external dependencies. 
* Optimized performance. 
* Security-focused with nonce verification. 
* Follows WordPress coding standards. 
* Free forever – no premium version.
<h3>How to Use</h3>
Adding a Link: 
1. Open the Classic Editor or add a Classic Block in Gutenberg. 
2. Select text or link. 
3. Click the “Extend Link” button in the toolbar. 
4. Configure your link options and save.
Checking Link Status: 
1. Open the Extend Link dialog. 
2. Enter or edit a URL. 
3. Click the “Check” button. 
4. See instant status feedback.
Adding ID/Class to Headings: 
1. Select a heading (H1-H6). 
2. Click “Extend Link” button. 
3. Add ID and/or classes (leave URL empty). 
4. Click “Save”.
<h3>Plugin Reference</h3>
Everything related to the plugin can be found on <a href="https://wp-time.com/how-to-add-link-attributes-in-wordpress/" rel="nofollow ugc">this page</a>.
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Extend Link

Add classes, IDs, titles, rel attributes, and download options to links. Includes H1–H6 heading support and built-in link status checker for SEO.

CyberNetikz

Just simple, if you use this plugin, <code>rel=nofollow</code> and <code>target=_blank</code> will be inserted automatically, for all the external links of your website posts, pages or theme menus.
Also you can set exclude domains, not to add <code>rel=nofollow</code> for the selected external domain links.
<blockquote>
If you need support, <a href="http://www.cybernetikz.com/wordpress-magento-plugins/wordpress-plugins/nofollow-external-link/#disqus_thread" rel="nofollow ugc">please leave your comment here</a>
</blockquote>
<h4>Feature</h4>
<ul>
<li>Add <code>rel=nofollow</code> for all the external links of your website posts / pages / menus.</li>
<li>Add <code>target=_blank</code> for all the external links of your website posts / pages / menus.</li>
<li>Support custom post type content.</li>
<li>Support WordPress multisite.</li>
<li>You can exclude domains, not to add <code>rel=nofollow</code> for the selected external links.</li>
<li>This plugin will not add <code>rel=nofollow</code> or <code>target=_blank</code> to any <code>href=#read-more</code> or <code>href=#gotop</code> type links.</li>
<li>This plugin will not add <code>rel=nofollow</code> or <code>target=_blank</code> any of the internal link on your website posts / pages.</li>
<li>If you already added <code>rel=dofollow</code> or <code>rel=nofollow</code> to any post manually, this plugin will not add <code>rel=nofollow</code> for that post.</li>
<li>If you already added <code>target=_blank</code> to any post manually, this plugin will not add <code>target=_blank</code> for that post.</li>
</ul>
You can visit our website <a href="http://www.cybernetikz.com/wordpress-magento-plugins/wordpress-plugins/nofollow-external-link/" rel="nofollow ugc">cybernetikz.com</a>
Wating for your valuable feedback/comments.
<h3>Support</h3>
<ul>
<li>[Plugin Homepage](* http://www.cybernetikz.com/wordpress-magento-plugins/wordpress-plugins/nofollow-external-link/)</li>
</ul>
<h3>Donations</h3>
Thanks for using this plugins

Nofollow for external link

Does exactly what it says!

Automatically insert rel=nofollow and target=_blank to all the external links into your website posts, pages or menus. Support exclude domain.

Extend Link vs Nofollow for external link