jassn 404 Monitor, Redirection, Custom 404 Page
jassn 404 Monitor, Redirection, Custom 404 Page
Description
jassn 404 Monitor is a complete solution to track and manage your site’s 404 errors. It logs broken links, lets you create redirects, and provides a custom 404 page with three built-in templates.
Features
-
404 Error Logging – Every 404 request is logged with:
- Requested URL
- Referrer
- Device (browser or mobile/tablet)
- Operating System
- Date/time (dd/mm/yyyy hh:mm:ss)
- Hit count (grouped by URL per day)
-
Redirection Manager – Add, delete, and toggle redirects:
- Support for 301 (permanent) and 302 (temporary) redirects
- Activate/deactivate redirects without deleting them
- Simple interface for source (relative URL) and target (full URL)
-
Custom 404 Page – Replace the default theme 404 page with your own:
- Choose from three built-in templates: Default, Modern, and Minimal
- Optionally use the content of any existing WordPress page as the 404 body
-
Green Admin Theme – All admin panels are responsive on desktop, tablet, and mobile.
-
Secure & Developer-Friendly – All inputs are sanitised, escaped, and nonce-verified.
Installation
- Upload the plugin folder to
/wp-content/plugins/, or install directly via the WordPress plugin repository. - Activate the plugin through the ‘Plugins’ screen in WordPress.
- Go to the new 404 Monitor menu in the WordPress admin sidebar to configure.
Screenshots

Dashboard – Overview of total 404 errors, active redirects, and custom 404 status.

404 Logs – Detailed log with URL, referer, device, OS, and last seen date.

Redirects – Add new redirects and manage existing ones with activate/deactivate toggles.

Custom 404 Settings – Enable/disable custom 404, choose template, and select a page for content.

Front-end 404 Page – Example of a custom 404 page using the Modern template.
Faq
Yes. 404 logging and redirects are processed before the cache is served, so it works with most caching plugins.
You can choose from the three built-in templates (Default, Modern, Minimal). Each template can be styled further using the included CSS file.
Go to 404 Monitor 404 Logs in your admin menu. You can view all logged errors, see device and OS details, and clear the logs.
The plugin logs IP addresses for diagnostic purposes. You can modify the logger to anonymise or disable IP logging if needed.
Reviews
Changelog
1.0.0
- Initial release.
- 404 logging, redirect manager, and custom 404 page.
- Three built-in templates (Default, Modern, Minimal).