Accessibility

· 13 checks — Landmarks, headings, alt text, forms, and link quality rolled into one auditable list.

SCORE

GRADE

FIX

REVIEW

PASS

INFO

Checks

6 PASS 2 REVIEW 5 FIX

Landmark Structure

Action

1 landmarks

FIX

1 landmarks

No <main> landmark found

Screen reader users cannot quickly navigate to the primary content. Wrap your main content in <main>.

1 <nav> landmark(s) found

No banner (header) landmark

No contentinfo (footer) landmark

Skip navigation link is missing (WCAG 2.4.1)

Add a skip link as the first focusable element so keyboard users can bypass repeated navigation.

Page Structure — as a screen reader sees it

Screen reader users cannot quickly navigate to the primary content. Wrap your main content in <main>.

Why this matters

Without a <main> landmark, screen-reader users can't skip past the navigation to the page content — every page starts with re-reading the menu.

Learn more ▾

The <main> element marks the page's primary content area. Assistive tech offers a 'jump to main' shortcut — but only if <main> exists. Without it, every page navigation forces re-reading the header. Wrap your primary content in a single <main>.

Source: WAI-ARIA / WCAG 2.4.1

Add a skip link as the first focusable element so keyboard users can bypass repeated navigation.

Why this matters

Without a skip-nav link, keyboard users tab through every nav item before reaching content — every page, every visit.

Learn more ▾

WCAG 2.4.1 (Bypass Blocks) requires a mechanism to skip past repeated content. The standard implementation is a 'Skip to main content' link that's the first focusable element, visually hidden until focused. Three lines of HTML + four of CSS.

Source: WCAG 2.1 SC 2.4.1

Web Manifest

Action

Not found

FIX

Not found

No web manifest found

No manifest at standard paths (/manifest.json, /site.webmanifest). A manifest is optional but enables PWA features like home screen installation and standalone display.

No web manifest found.

Dark Mode Support

Action

No dark mode signals

FIX

No dark mode signals

No dark mode signals detected

Consider adding CSS with @media (prefers-color-scheme: dark) and <meta name='color-scheme' content='light dark'>.

Detection limited to meta tags and inline styles

External CSS files may contain prefers-color-scheme rules not visible to this scan.

Dark ModeNo Dark Mode Detected

color-scheme meta Not set ✗Dark theme-color Not set ✗CSS indicators Not detected ✗

Detection limited to meta tags and inline styles.

Print Stylesheet

Action

No print styles

FIX

No print styles

No print-specific styles detected

When users print this page, they get the screen layout including navigation and non-essential elements. Add @media print rules to hide navigation and optimize layout for paper.

Print Stylesheet No Print Styles

Print stylesheet Not found ✗Inline @media print Not detected ✗

Navigation UX

Action

No navigation patterns

FIX

No navigation patterns

1 navigation landmark(s) detected

No breadcrumbs, search, or skip link detected

These navigation aids help users orient themselves and find content efficiently, especially on large sites.

Breadcrumbs

Skip Link

Labeled Navigation 1 <nav> element(s)

Hamburger Menu

Sticky Navigation Cannot reliably detect (CSS-based)

1 of 6 testable patterns navigation patterns detected. Limited navigation support. Consider adding breadcrumbs, search, and skip link.

404 Error Page

Action

HTTP 404, custom page

REVIEW

HTTP 404, custom page

Correct 404 status code returned

Got: HTTP 404

Custom styled 404 page

Homepage link present on 404 page

404 Page Quality ✓ Custom 404 Page

Status Code HTTP 404 ✓Page Title Object not found! ✓Custom Styling ✓Navigation ✗Homepage Link ✓Search Form ✗

Favicon & Branding

Action

3 icon(s) detected

REVIEW

3 icon(s) detected

favicon.ico present at site root

HTML icon links detected

No apple-touch-icon detected

iOS devices use this when users add your site to their home screen. Add <link rel='apple-touch-icon' sizes='180x180' href='/apple-touch-icon.png'>.

Multiple icon sizes detected

✓ favicon.ico Present

✓ PNG Icons Present

✗ Apple Touch Missing

✗ SVG Favicon Missing

✗ Manifest Icons Missing

✓ Multiple Sizes Present

A+

Heading Hierarchy

11 headings

PASS

11 headings

Single H1 present

H2 Download
H2 R Project
H2 R Foundation
H2 Help With R
H2 Documentation
H2 Links
H1 The R Project for Statistical Computing
H2 Getting Started
H2 News
H2 News via Mastodon
H2 Social Media

A+

Alt Text Quality

1 of 1 images have issues

PASS

1 of 1 images have issues

1 image(s) with generic alt text

1 images 1 generic

Issue	Count
generic	1 image(s)

A+

Form Accessibility

No form controls

PASS

No form controls

No form controls on this page

No form controls found.

A+

Link & Button Quality

42 links, 0 buttons — all OK

PASS

42 links, 0 buttons — all OK

42 link(s) with descriptive text

42 links

0 empty

0 generic text

0 new tab

0 empty buttons

All links and buttons have descriptive accessible text.

42 links and buttons have descriptive text

A+

Color Contrast (Screenshot)

20 text elements analyzed, 0 fail WCAG AA

PASS

Analyzes text contrast against the actual rendered page, including background images, gradients, and overlays that CSS-based tools cannot detect.

20 pass

Show all checked elements (20)

Element	Ratio	Required	FG	BG	Result
h1 The R Project for St…	21.00:1	3.0:1	#000000	#FFFFFF	Pass
h2 Download	21.00:1	3.0:1	#000000	#FFFFFF	Pass
h2 R Project	21.00:1	3.0:1	#000000	#FFFFFF	Pass
h2 R Foundation	21.00:1	3.0:1	#000000	#FFFFFF	Pass
h2 Help With R	21.00:1	3.0:1	#000000	#FFFFFF	Pass
h2 Documentation	21.00:1	3.0:1	#000000	#FFFFFF	Pass
h2 Links	21.00:1	3.0:1	#000000	#FFFFFF	Pass
h2 Getting Started	21.00:1	3.0:1	#000000	#FFFFFF	Pass
h2 News	21.00:1	3.0:1	#000000	#FFFFFF	Pass
h2 News via Mastodon	21.00:1	3.0:1	#000000	#FFFFFF	Pass
h2 Social Media	21.00:1	3.0:1	#000000	#FFFFFF	Pass
title R: The R Project for…	21.00:1	4.5:1	#000000	#FFFFFF	Pass
a [Home]	21.00:1	4.5:1	#000000	#FFFFFF	Pass
a CRAN	21.00:1	4.5:1	#000000	#FFFFFF	Pass
a About R	21.00:1	4.5:1	#000000	#FFFFFF	Pass
a Logo	21.00:1	4.5:1	#000000	#FFFFFF	Pass
a Contributors	21.00:1	4.5:1	#000000	#FFFFFF	Pass
a What’s New?	21.00:1	4.5:1	#000000	#FFFFFF	Pass
a Reporting Bugs	21.00:1	4.5:1	#000000	#FFFFFF	Pass
a Conferences	21.00:1	4.5:1	#000000	#FFFFFF	Pass

Methodology: The top 20 text elements by font size were checked. Background color was sampled from the desktop screenshot using a 5-point pattern. WCAG 2.1 AA requires 4.5:1 for normal text and 3:1 for large text.

Lighthouse Accessibility Audits

Score 91/100 — 3 failing, 22 passed

PASS

Accessibility

These checks highlight opportunities to improve the accessibility of your web app. Automatic detection can only detect a subset of issues and does not guarantee the accessibility of your web app, so manual testing is also encouraged.

Contrast

Low-contrast text is difficult or impossible for many users to read. Link text that is discernible improves the experience for users with low vision. Learn how to make links distinguishable.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
CRAN mirror `div.row > div.col-xs-12 > p > a`
answers to frequently asked questions `div.row > div.col-xs-12 > p > a`
supporting member `div.col-xs-12 > ul > li > a`
Mastodon `div.row > div.col-xs-12 > p > a`
BlueSky `div.row > div.col-xs-12 > p > a`
LinkedIn `div.row > div.col-xs-12 > p > a`
the webmaster `body > div.container > div.raw > a`
Getting Help `body > div.container > div.raw > a`

These are opportunities to improve the legibility of your content.

Best practices

Touch targets with sufficient size and spacing help users who may have difficulty targeting small controls to activate the targets. Learn more about touch targets.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
About R `div.col-xs-6 > ul > li > a`
Logo `div.col-xs-6 > ul > li > a`
Contributors `div.col-xs-6 > ul > li > a`
What’s New? `div.col-xs-6 > ul > li > a`
Reporting Bugs `div.col-xs-6 > ul > li > a`
Conferences `div.col-xs-6 > ul > li > a`
Get Involved: Mailing Lists `div.col-xs-6 > ul > li > a`
Get Involved: Contributing `div.col-xs-6 > ul > li > a`
Board `div.col-xs-6 > ul > li > a`
Members `div.col-xs-6 > ul > li > a`
Donors `div.col-xs-6 > ul > li > a`
Donate `div.col-xs-6 > ul > li > a`
Manuals `div.col-xs-6 > ul > li > a`
FAQs `div.col-xs-6 > ul > li > a`
R-Forge `div.col-xs-6 > ul > li > a`
R-Hub `div.col-xs-6 > ul > li > a`
GSoC `div.col-xs-6 > ul > li > a`
#CascadiaRConf `div.toot-text > div > p > a.mention`

One main landmark helps screen reader users navigate a web page. Learn more about landmarks.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
html `html`

These items highlight common accessibility best practices.

○Interactive controls are keyboard focusable

○Interactive elements indicate their purpose and state

○The page has a logical tab order

○Visual order on the page follows DOM order

○User focus is not accidentally trapped in a region

○The user's focus is directed to new content added to the page

○HTML5 landmark elements are used to improve navigation

○Offscreen content is hidden from assistive technology

○Custom controls have associated labels

○Custom controls have ARIA roles

●`[aria-*]` attributes match their roles

●`[aria-hidden="true"]` is not present on the document `<body>`

●`[role]`s have all required `[aria-*]` attributes

●Elements with an ARIA `[role]` that require children to contain a specific `[role]` have all required children.

●`[role]` values are valid

●`[aria-*]` attributes have valid values

●`[aria-*]` attributes are valid and not misspelled

●Image elements have `[alt]` attributes

●`[user-scalable="no"]` is not used in the `<meta name="viewport">` element and the `[maximum-scale]` attribute is not less than 5.

●ARIA attributes are used as specified for the element's role

●Elements use only permitted ARIA attributes

●Background and foreground colors have a sufficient contrast ratio

●Document has a `<title>` element

●`<html>` element has a `[lang]` attribute

●`<html>` element has a valid value for its `[lang]` attribute

●Links have a discernible name

●Lists contain only `<li>` elements and script supporting elements (`<script>` and `<template>`).

●List items (`<li>`) are contained within `<ul>`, `<ol>` or `<menu>` parent elements

●No element has a `[tabindex]` value greater than 0

●Heading elements appear in a sequentially-descending order

●Deprecated ARIA roles were not used

●Identical links have the same purpose.

○`[accesskey]` values are unique

○`button`, `link`, and `menuitem` elements have accessible names

○Elements with `role="dialog"` or `role="alertdialog"` have accessible names.

○`[aria-hidden="true"]` elements do not contain focusable descendents

○ARIA input fields have accessible names

○ARIA `meter` elements have accessible names

○ARIA `progressbar` elements have accessible names

○`[role]`s are contained by their required parent element

○Elements with the `role=text` attribute do not have focusable descendents.

○ARIA toggle fields have accessible names

○ARIA `tooltip` elements have accessible names

○ARIA `treeitem` elements have accessible names

○Buttons have an accessible name

○The page contains a heading, skip link, or landmark region

○`<dl>`'s contain only properly-ordered `<dt>` and `<dd>` groups, `<script>`, `<template>` or `<div>` elements.

○Definition list items are wrapped in `<dl>` elements

○ARIA IDs are unique

○No form fields have multiple labels

○`<frame>` or `<iframe>` elements have a title

○`<html>` element has an `[xml:lang]` attribute with the same base language as the `[lang]` attribute.

○Input buttons have discernible text.

○`<input type="image">` elements have `[alt]` text

○Form elements have associated labels

○The document does not use `<meta http-equiv="refresh">`

○`<object>` elements have alternate text

○Select elements have associated label elements.

○Skip links are focusable.

○Cells in a `<table>` element that use the `[headers]` attribute refer to table cells within the same table.

○`<th>` elements and elements with `[role="columnheader"/"rowheader"]` have data cells they describe.

○`[lang]` attributes have a valid value

○`<video>` elements contain a `<track>` element with `[kind="captions"]`

○Tables have different content in the summary attribute and `<caption>`.

○All heading elements contain content.

○Uses ARIA roles only on compatible elements

○Image elements do not have `[alt]` attributes that are redundant text.

○Elements with visible text labels have matching accessible names.

○Tables use `<caption>` instead of cells with the `[colspan]` attribute to indicate a caption.

○`<td>` elements in a large `<table>` have one or more table headers.

All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.