WP Speed 404 can either suppress or log any 404 errors affecting your site under wp-content, wp-admin and wp-includes (configurable). 404 errors are generally very 'expensive' on WP sites as they cause WP to run on every attempt, slowing down your site and causing additional load on your web hosting environment.

fix all kinds of 404s, fix broken link & images automatically,log each 404,redirect each broken link to specific URL,404 mail alert,export 404s,redirect 404 to home page or any URL using 301, stop 404 Page Not Found happen again

Never get a 404 page not found again. If you have restructured or moved your blog, this plugin will find the right post or page every time.

Find the right post from various URL pattern. Especially permalink starts with post_id.

Prevents WordPress from delivering full Page-Not-Found errors when the browser is not expecting a full HTML page. Saves bandwidth and improves performance.

This plugin allows you to automatically produce 301 redirects to the home page or another URL for deleted posts and taxonomies to avoid 404 errors.

Disable Author Archives completely removes author archives and makes the web server return status code 404 ('Not Found') instead.

No more 404 errors and redirections due to missing resources. When a resource is not found, the plugin will replace it with an empty resource.

Display placeholder Lorem Picsum images to avoid chains of 404 requests caused by an incomplete uploads directory (while developing)

Bing404 transforms your standard "We can't find that" to "Maybe one of these is what you are looking for".

With this simple plugin you can assign custom pages (with custom content etc.) as error pages. This works for 404 (page not found) and 403 (forbidden/permission denied).

Utilitify helps you enhance & customize your WordPress site. Power pack utilities of this plugin make people's live easier

This module is a workaround to use pretty permalinks without any rewrite rule.

Broken Link Checker - allow users to check and fix broken links entire website includes your posts, comments and missing images.

Responsive and modern error 404 page.

Extracts errors from your debug.log and groups them into individual items.

Appends "did you mean" links to your "404" page.

Create custom 401 and 403 error pages with any WordPress theme without writing a single line of code, set it up and forget it.