Pragmatic Bear

LinkSentinel keeps your site healthy by scanning internal links in your posts and pages. It detects redirects and broken destinations without following all hops blindly, letting you focus on what matters:
<ul>
<li>Auto-fixes links that are permanently redirected (HTTP 301/308) while leaving temporary redirects and broken links for review.</li>
<li>Runs scheduled scans (daily/twice daily/weekly) with timezone-aware cron control and live progress feedback.</li>
<li>Provides a full dashboard under Tools → LinkSentinel for resolved links, pending redirects, broken links, CSV export and settings.</li>
<li>Customizable Resolve All batching with cooldown controls keeps bulk fixes stable even on rate-limited hosts.</li>
</ul>

LinkSentinel – Internal Link and Broken Link Scanner

Scan internal links for redirects and broken destinations. Auto-fix 301/308 permanent redirects and queue the rest for review.

Redirects visitors to the the site’s URL as it appears in the WordPress database in case they’re not already connecting through that domain. This is handy for secondary domains that point to your WordPress site.
For example, if example.com and example.net both point to your server, WordPress will normally serve the same site regardless of what the user types in their address bar. 
With this plugin enabled, users visiting the secondary domain will be automatically redirected to whichever domain is configured as the “Site Address (URL)” under WordPress’ “General Settings” page.

Multidomain Redirect

Redirects visitors to the the site's URL as it appears in the WordPress database in case they're not already connecting through that domain.

LinkSentinel – Internal Link and Broken Link Scanner vs Multidomain Redirect