JoshuaPack

Why choose this plugin?
<ul>
<li>404 pages not working? </li>
<li>Would you like to have a custom 404 page? </li>
<li>Would you like the 404 page to be a static page? </li>
<li>Do you need to have a WordPress CMS page as your 404 page?</li>
</ul>
This plugin does it!
This a rebel plugin that does not use WordPress’s 404 hook. It was developed for themes or plugins that cause issues with the hook itself.
For more information see FAQ page.

HTD 404

This plugin will simply allow you to point to a page to serve up if you get a 404 error. Also it marks it as 404.

Josh Pollock

Ben Meredith

Jason Bahl

Headless mode sets up a redirect for all users trying to access the site. The only requests that are granted admission are ones that are either trying to access the REST API, the WP GraphQL API, or any logged-in user looking to access the headless install to edit or create posts.

Headless Mode

This tiny plugin works exactly as intended. 

Simple to set up and works great!

Once you take the head off of WordPress, nobody needs to see it. This plugin hides the front end by redirecting to the shiny static (etc) site.

HTD 404 vs Headless Mode