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

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.

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".

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.

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

This plugin can fix typing errors (TYPO) in URLs and search by visitors.

This is a Wordpress plugin that turns your 404 "page not found" error into a page devoted to helping find missing children.

Allows you to select a page to use as the content of your 404 page.

Redirect all 404 errors to a specific page

Log and send alerts for various errors as they happen throughout your WordPress site.

Easily redirect pages, posts and tags or custom post types to another page or post or external URL by specifying the redirect URL.

Send the site administrator an email when someone encounters a 404 error on your blog