Documentation
Accessibility
accesskey attribute value must be unique
Active <area> elements must have alternate …
Elements must only use allowed ARIA …
ARIA role must be appropriate for …
ARIA commands must have an accessible …
ARIA dialog and alertdialog nodes must …
aria-hidden='true' must not be present on …
ARIA hidden element must not contain …
ARIA input fields must have an …
ARIA meter nodes must have an …
ARIA progressbar nodes must have an …
Required ARIA attributes must be provided
Certain ARIA roles must contain particular …
Certain ARIA roles must be contained …
Use aria-roledescription on elements with a …
ARIA roles used must conform to …
ARIA toggle fields have an accessible …
ARIA tooltip nodes must have an …
ARIA treeitem nodes must have an …
ARIA attributes must conform to valid …
ARIA attributes must conform to valid …
autocomplete attribute must be used correctly
Inline text spacing must be adjustable …
<blink> elements are deprecated and must …
Buttons must have discernible text
Page must have means to bypass …
Elements must have sufficient color contrast
Custom controls have associated labels
Custom controls have ARIA roles
<dl> elements must only directly contain …
<dt> and <dd> elements must be …
Documents must have <title> element to …
id attribute value must be unique
IDs of active elements must be …
IDs used in ARIA and labels …
Headings must not be empty
Interactive controls are keyboard focusable
User focus is not accidentally trapped …
Form field should not have multiple …
Frames must have title attribute
Frames must have a unique title …
Ensure all parts of the document …
Heading levels should only increase by …
<audio> element not supported by FIREFOX
<dialog> element not supported by FIREFOX
<dialog> element not supported by SAFARI
<input type="color"> element not supported by …
<input type="color"> element not supported by …
<input type="date"> element not supported by …
<input type"datetime-local"> element not supported by …
<input type"datetime-local"> element not supported by …
<input type="month"> element not supported by …
<input type="month"> element not supported by …
<input type="time"> element not supported by …
<input type="week"> element not supported by …
<input type="week"> element not supported by …
<meter> element not supported by FIREFOX
<video> element not supported by FIREFOX
<html> element must have a lang …
<html> element must have a valid …
HTML elements with lang and xml:lang …
Links with the same name have …
Images must have alternate text
Alternative text of images should not …
Input buttons must have discernible text
Image buttons must have alternate text
The ISO language code matches the …
The ISO language code used is …
The dir attribute is correctly set …
Form elements must have labels
Form elements should have a visible …
Banner landmark must not be contained …
Aside must not be contained in …
Contentinfo landmark must not be contained …
Main landmark must not be contained …
Document must not have more than …
Document must not have more than …
Document must not have more than …
Document must have one main landmark
Ensures landmarks are unique
Links must have discernible text
<ul> and <ol> must only directly …
<li> elements must be contained in …
<marquee> elements are deprecated and must …
Timed refresh must not exist
Zooming and scaling must not be …
<object> elements must have alternate text
Documents with multiple pages must have …
Document must have a language
PDF protection and permissions
Documents must be tagged
Document must have a title
All page content must be contained …
[role='img'] elements have an alternative text
scope attribute should be used correctly
Select element must have and accessible …
Server-side image maps must not be …
The skip-link target should exist and …
svg elements with an img role …
Elements should not have tabindex greater …
The <caption> element should not contain …
Tap targets are sized appropriately
All cells in a table element …
All th elements and elements with …
Use landmark elements
lang attribute must have a valid …
<video> elements must have captions
Visual order on the page follows …
Code
Avoids application cache
JavaScript execution time
Links must point to a valid …
Properly defines charset
Avoid chaining critical requests
Avoids deprecated APIs
Page has the HTML doctype
Avoids an excessive DOM size
Remove duplicate modules in JavaScript bundles
Use video formats for animated content
No browser errors logged to the …
All text remains visible during webfont …
Avoids requesting the geolocation permission on …
Duplicate page found
<audio> element not supported by FIREFOX
<dialog> element not supported by FIREFOX
<dialog> element not supported by SAFARI
<input type="color"> element not supported by …
<input type="color"> element not supported by …
<input type="date"> element not supported by …
<input type"datetime-local"> element not supported by …
<input type"datetime-local"> element not supported by …
<input type="month"> element not supported by …
<input type="month"> element not supported by …
<input type="time"> element not supported by …
<input type="week"> element not supported by …
<input type="week"> element not supported by …
<video> element not supported by FIREFOX
Displays images with correct aspect ratio
Serves images with appropriate resolution
No issues in the Issues panel …
Documents must not be corrupt
Soft 404
Minify CSS
Minify JavaScript
Image elements have explicit width and …
Remove unused CSS
Remove unused JavaScript
Uses passive listeners to improve scrolling …
Enable text compression
Serve images in next-gen formats
Page has valid source maps
Content
Google uses the description in the …
Google uses the title in the …
<html> element must have a lang …
<html> element must have a valid …
HTML elements with lang and xml:lang …
The ISO language code used is …
Document must have a language
Documents must be tagged
Document must have a title
Performance
Cumulative Layout Shift
Estimated Input Latency is too high
First Contentful Paint
First CPI idle marks the first …
First Meaningful Paint
Privacy and GDPR
Avoids deprecated APIs
Avoids requesting the geolocation permission on …
Has cookies
Third party cookies
No trackers or beacons found
PDF protection and permissions
SEO
Document has a valid rel=canonical
Links are crawlable
Document uses legible font sizes
Google uses the description in the …
Google uses the title in the …
Duplicate page found
A sitemap was found for your …
Document has a valid hreflang
Page has successful HTTP status code
Links have descriptive text
Document must have a language
Document must have a title
robots.txt is valid
Soft 404
Tap targets are sized appropriately
Has a <meta name="viewport"> tag with …
Your Network
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Module Documentation for SEO
Document has a valid rel=canonical
Links are crawlable
Document uses legible font sizes
Google uses the description in the SERPs
Google uses the title in the SERPs
Duplicate page found
A sitemap was found for your website.
Document has a valid hreflang
Page has successful HTTP status code
Links have descriptive text
Document must have a language
Document must have a title
robots.txt is valid
Soft 404
Tap targets are sized appropriately
Has a <meta name="viewport"> tag with width or initial-scale