404page – your smart custom 404 error page 11.2.3

Does "404page - your smart custom 404 error page" work with WordPress 5.5 and PHP 7.2.16? A smoke test was performed on .


No PHP errors, warnings or notices
No JavaScript exceptions
All test pages loaded successfully
No resource errors
Looks good! No problems were detected.

Memory usage: 94.31 KiB
The average PHP memory usage increased by this amount after activating by the plugin.

Page speed impact: insignificant.
The plugin didn't make the site noticeably slower.

WordPress version5.5
PHP version7.2.16
MySQL version8.0.15
PHP memory limit256M
Plugin Info
Last updated
Active installs 100,000+
WordPress.org page https://wordpress.org/plugins/404page/

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Pages 3

Plugins ‹ Test site — WordPress

Page screenshot: Plugins ‹ Test site — WordPress
URL /wp-admin/plugins.php?plugin_status=all&paged=1&s
Requested URL /wp-admin/plugins.php?action=activate&plugin=404page%2F404page.php&plugin_status=all&paged=1&s&_wpnonce=a245b918ed
Aspect after-activation
HTTP status 200
Load time 0.288 s
Memory usage 3.97 MiB
JS errors None
Resource errors None

Appearance → 404 Error Page

Page screenshot: Appearance → 404 Error Page
URL /wp-admin/themes.php?page=404pagesettings
Aspect menu-item
HTTP status 200
Load time 0.294 s
Memory usage 3.96 MiB
JS errors None
Resource errors None

Test site – Just another WordPress site

Page screenshot: Test site – Just another WordPress site
Aspect front-page
HTTP status 200
Load time 0.198 s
Memory usage 3.68 MiB
JS errors None
Resource errors None


URL Load time Memory usage
Inactive Active Change Inactive Active Change
/wp-admin/index.php0.550 s0.298 s-0.252 s3.96 MiB4.09 MiB+ 126.2 KiB
/wp-admin/edit.php0.208 s0.221 s+0.013 s3.99 MiB4.11 MiB+ 120.7 KiB
/wp-admin/post-new.php1.489 s2.090 s+0.601 s5.81 MiB5.94 MiB+ 126.68 KiB
/wp-admin/upload.php0.985 s0.484 s-0.501 s3.83 MiB3.94 MiB+ 119.56 KiB
/wp-admin/options-writing.php0.142 s0.166 s+0.024 s3.9 MiB3.93 MiB+ 26.08 KiB
/wp-admin/media-new.php0.193 s0.191 s-0.002 s3.8 MiB3.92 MiB+ 119.73 KiB
/wp-admin/edit-tags.php?taxonomy=category0.191 s0.183 s-0.008 s3.91 MiB3.96 MiB+ 56.64 KiB
/wp-admin/post-new.php?post_type=page2.227 s2.190 s-0.037 s5.8 MiB5.92 MiB+ 119.86 KiB
/wp-admin/options-discussion.php0.251 s0.270 s+0.019 s3.81 MiB3.93 MiB+ 120 KiB
/wp-admin/edit-comments.php0.203 s0.276 s+0.073 s3.91 MiB4.03 MiB+ 119.55 KiB
/0.593 s0.219 s-0.374 s3.69 MiB3.68 MiB- 17.63 KiB
Average 0.639 s0.599 s-0.040 s4.22 MiB4.31 MiB+ 94.31 KiB


Things that the plugin adds to the site. This section is not intended to be comprehensive. The test tool only looks for a few specific types of added content.

Options wp_options 1

PHP Error Log

The log file is empty.

See also: All tests for this plugin, How to Hide the "404 Error Page" Admin Menu