Report - Yoast SEO 27.1.1 - PluginTests.com

Does Yoast SEO work with WordPress 6.9.1 and PHP 8.1.12? A smoke test was performed on 2026-03-05 08:52:31 UTC.

Summary

Errors

1	PHP deprecation warnings
2	JavaScript exceptions
	All test pages loaded successfully
	No resource errors

Performance

Memory usage: 1.27 MiB
The average PHP memory usage increased by this amount after activating by the plugin.

Page speed impact: 0.233 seconds
The average page load time increased by this amount after activating the plugin.

Environment

WordPress version	6.9.1
PHP version	8.1.12
MySQL version	10.6.10
PHP memory limit	512M

Plugin Info

Last updated	2026-03-03T13:51:00+00:00
Active installs	10,000,000+
WordPress.org page	https://wordpress.org/plugins/wordpress-seo/
Badges	Get badge code

Pages 17

‹ Test site — WordPress

URL	/wp-admin/admin.php?page=wpseo_installation_successful_free
Requested URL	/wp-admin/plugins.php?action=activate&plugin=wordpress-seo%2Fwp-seo.php&plugin_status=all&paged=1&s&_wpnonce=08b0efdcbb
Aspect	after-activation
HTTP status	200
Load time	2.435 s
Memory usage	4.92 MiB
JS errors	None
Resource errors	None

Tools → Yoast Redirects

URL	/wp-admin/admin.php?page=wpseo_redirects&from_tools=1
Requested URL	/wp-admin/tools.php?page=wpseo_redirects_tools
Aspect	menu-item
HTTP status	200
Load time	0.439 s
Memory usage	4.85 MiB
JS errors	None
Resource errors	None

Yoast SEO

URL	/wp-admin/admin.php?page=wpseo_dashboard
Aspect	menu-item
HTTP status	200
Load time	1.527 s
Memory usage	4.95 MiB
JS errors	None
Resource errors	None

Yoast SEO → Settings

URL	/wp-admin/admin.php?page=wpseo_page_settings
Aspect	menu-item
HTTP status	200
Load time	0.613 s
Memory usage	5.01 MiB
JS errors	None
Resource errors	None

Yoast SEO → Integrations

URL	/wp-admin/admin.php?page=wpseo_integrations
Aspect	menu-item
HTTP status	200
Load time	0.748 s
Memory usage	4.88 MiB
JS errors	None
Resource errors	None

Yoast SEO → Tools

URL	/wp-admin/admin.php?page=wpseo_tools
Aspect	menu-item
HTTP status	200
Load time	0.672 s
Memory usage	5.26 MiB
JS errors	None
Resource errors	None

Yoast SEO → Academy

URL	/wp-admin/admin.php?page=wpseo_page_academy
Aspect	menu-item
HTTP status	200
Load time	0.552 s
Memory usage	4.86 MiB
JS errors	None
Resource errors	None

Yoast SEO → Plans

URL	/wp-admin/admin.php?page=wpseo_licenses
Aspect	menu-item
HTTP status	200
Load time	0.334 s
Memory usage	4.83 MiB
JS errors	None
Resource errors	None

Yoast SEO → Workouts

URL	/wp-admin/admin.php?page=wpseo_workouts
Aspect	menu-item
HTTP status	200
Load time	0.739 s
Memory usage	4.9 MiB
JS errors	None
Resource errors	None

Yoast SEO → Redirects

URL	/wp-admin/admin.php?page=wpseo_redirects
Aspect	menu-item
HTTP status	200
Load time	0.364 s
Memory usage	4.83 MiB
JS errors	None
Resource errors	None

Yoast SEO → Support

URL	/wp-admin/admin.php?page=wpseo_page_support
Aspect	menu-item
HTTP status	200
Load time	0.364 s
Memory usage	4.83 MiB
JS errors	None
Resource errors	None

Yoast SEO → Upgrade

URL	https://yoast.com/reasons-to-upgrade/?days_active=0&navigation_page=main-menu&php_version=8.1&platform=wordpress&platform_version=6.9.1&screen=wpseo_upgrade_sidebar&shortlink=wordpress-menu-upgrade-premium&software=free&software_version=27.1.1&utm_campaign=evergreen&utm_content=upgrade-button&utm_medium=software&utm_source=yoast-seo-free&utm_term=upsell
Requested URL	/wp-admin/admin.php?page=wpseo_upgrade_sidebar
Aspect	menu-item
HTTP status	200
Load time	5.949 s
Memory usage	N/A
JS errors	[ { "message": "ReferenceError: gtag is not defined\n at <anonymous>:1:1\n at https://www.googletagmanager.com/gtm.js?id=GTM-NHRB36F:984:429\n at fR (https://www.googletagmanager.com/gtm.js?id=GTM-NHRB36F:986:31)\n at Od.eR (https://www.googletagmanager.com/gtm.js?id=GTM-NHRB36F:983:92)\n at Od.<anonymous> (https://www.googletagmanager.com/gtm.js?id=GTM-NHRB36F:409:187)\n at Pd.k.apply (https://www.googletagmanager.com/gtm.js?id=GTM-NHRB36F:335:466)\n at kb (https://www.googletagmanager.com/gtm.js?id=GTM-NHRB36F:297:209)\n at jb (https://www.googletagmanager.com/gtm.js?id=GTM-NHRB36F:296:527)\n at Od.<anonymous> (https://www.googletagmanager.com/gtm.js?id=GTM-NHRB36F:359:473)\n at Pd.k.apply (https://www.googletagmanager.com/gtm.js?id=GTM-NHRB36F:335:466)", "trace": null, "code": null } ]
Resource errors	None

Yoast SEO → AI Brand Insights

URL	https://yoast.com/product/yoast-seo-ai-plus/?utm_source=yoast-seo-free&utm_campaign=evergreen&utm_term=upsell&utm_content=brand-insights-wp-admin&navigation_page=main-menu&php_version=8.1&platform=wordpress&platform_version=6.9.1&software=free&software_version=27.1.1&days_active=0&screen=wpseo_brand_insights&shortlink=brand-insights-wp-admin
Requested URL	/wp-admin/admin.php?page=wpseo_brand_insights
Aspect	menu-item
HTTP status	200
Load time	4.046 s
Memory usage	N/A
JS errors	`[ { "message": "ReferenceError: gtag is not defined\n at <anonymous>:1:1\n at https://www.googletagmanager.com/gtm.js?id=GTM-NHRB36F:984:429\n at fR (https://www.googletagmanager.com/gtm.js?id=GTM-NHRB36F:986:31)\n at https://www.googletagmanager.com/gtm.js?id=GTM-NHRB36F:986:63", "trace": null, "code": null } ]`
Resource errors	None

Test site - Just another WordPress site

URL	/
Aspect	front-page
HTTP status	200
Load time	0.762 s
Memory usage	5.3 MiB
JS errors	None
Resource errors	None

Dashboard ‹ Test site — WordPress

URL	/wp-admin/index.php
Aspect	new-meta-boxes
HTTP status	200
Load time	0.479 s
Memory usage	4.96 MiB
JS errors	None
Resource errors	None

Add Post ‹ Test site — WordPress

URL	/wp-admin/post-new.php
Aspect	new-meta-boxes
HTTP status	200
Load time	1.387 s
Memory usage	8.08 MiB
JS errors	None
Resource errors	None

Add Page ‹ Test site — WordPress

URL	/wp-admin/post-new.php?post_type=page
Aspect	new-meta-boxes
HTTP status	200
Load time	1.033 s
Memory usage	8.06 MiB
JS errors	None
Resource errors	None

Benchmark

URL	Load time			Memory usage
URL	Inactive	Active	Change	Inactive	Active	Change
/wp-admin/index.php	0.411 s	0.988 s	+0.577 s	3.78 MiB	4.96 MiB	+ 1.18 MiB
/wp-admin/edit.php	0.331 s	0.404 s	+0.073 s	3.78 MiB	5.16 MiB	+ 1.38 MiB
/wp-admin/post-new.php	0.725 s	1.478 s	+0.753 s	6.31 MiB	8.15 MiB	+ 1.84 MiB
/wp-admin/upload.php	0.408 s	0.652 s	+0.244 s	3.74 MiB	4.87 MiB	+ 1.13 MiB
/wp-admin/options-writing.php	0.574 s	0.368 s	-0.206 s	3.71 MiB	4.83 MiB	+ 1.12 MiB
/wp-admin/media-new.php	0.501 s	0.633 s	+0.132 s	3.7 MiB	4.82 MiB	+ 1.12 MiB
/wp-admin/edit-tags.php?taxonomy=category	0.300 s	0.357 s	+0.057 s	3.72 MiB	4.85 MiB	+ 1.14 MiB
/wp-admin/post-new.php?post_type=page	0.619 s	1.001 s	+0.382 s	6.3 MiB	8.06 MiB	+ 1.76 MiB
/wp-admin/options-discussion.php	0.301 s	0.771 s	+0.470 s	3.71 MiB	4.84 MiB	+ 1.12 MiB
/wp-admin/edit-comments.php	0.293 s	0.501 s	+0.208 s	3.73 MiB	4.87 MiB	+ 1.14 MiB
/	0.307 s	0.178 s	-0.129 s	4.11 MiB	5.11 MiB	+ 1 MiB
Average	0.434 s	0.666 s	+0.233 s	4.24 MiB	5.5 MiB	+ 1.27 MiB

Code Statistics

Note: Third-party libraries and minified JS/CSS files are excluded from these statistics where possible, so the numbers you see here may be lower than those reported by other tools.

PHP

Language		%	Lines of code	Comment lines	Files
	PHP	99.0%	78,351	69,472	1,359
	SVG	0.6%	457	1	80
	JSON	0.2%	149	0	3
	XSLT	0.2%	145	0	1
	XML	0.1%	44	0	1
	Markdown	0.0%	24	0	1
Total			79,170	69,473	1,445

PHP Code Analysis | More results »

Lines of code	66,749
Total complexity	13,019
Median class complexity	5.0
Median method complexity	1.0
Most complex class	Yoast\WP\SEO\Generated\Cached_Container
Most complex function	WPSEO_Option_Titles::validate_option()

Classes	1,055
Methods	5,917
Functions	51

Additions

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.

Database Tables 5

wp_yoast_indexable
wp_yoast_indexable_hierarchy
wp_yoast_migrations
wp_yoast_primary_term
wp_yoast_seo_links

Options `wp_options` 6

wpseo
wpseo_llmstxt
wpseo_social
wpseo_titles
wpseo_tracking_only
yoast_migrations_free

User Metadata `wp_usermeta` 3

wp_yoast_notifications
_yoast_wpseo_introductions
_yoast_wpseo_task_list_opt_in_notification_seen

Meta Boxes

{
    "dashboard": {
        "wpseo-dashboard-overview": {
            "title": "Yoast SEO Posts Overview",
            "context": "normal"
        },
        "wpseo-wincher-dashboard-overview": {
            "title": "Yoast SEO / Wincher: Top Keyphrases",
            "context": "normal"
        }
    },
    "post": {
        "wpseo_meta": {
            "title": "Yoast SEO",
            "context": "normal"
        }
    },
    "page": {
        "wpseo_meta": {
            "title": "Yoast SEO",
            "context": "normal"
        }
    }
}

Roles 2

ID	Name
wpseo_manager	SEO Manager
wpseo_editor	SEO Editor

Capabilities 4

wpseo_manage_options
wpseo_bulk_edit
wpseo_edit_advanced_metadata
view_site_health_checks

PHP Error Log 1 lines

[05-Mar-2026 08:52:49 UTC] PHP Deprecated:  strip_tags(): Passing null to parameter #1 ($string) of type string is deprecated in /wp-admin/admin-header.php on line 41

Yoast SEO 27.1.1