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Accessibility

· 13 checks — Landmarks, headings, alt text, forms, and link quality rolled into one auditable list.
SCORE
52
GRADE
F
FIX
8
REVIEW
2
PASS
3
INFO
0
Checks
13
3 PASS 2 REVIEW 8 FIX
D
Landmark Structure
Action
18 landmarks
FIX
18 landmarks
Critical::
No <main> landmark found
Screen reader users cannot quickly navigate to the primary content. Wrap your main content in <main>.
Info::
8 <nav> landmark(s) found
Warning::
1 of 8 <nav> elements are unlabeled
Multiple navigations need aria-label to distinguish them for screen readers.
Warning::
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.
Info::
Search landmark present
Page Structure — as a screen reader sees it
BANNER header NAV SEARCH MAIN (missing!) CONTENTINFO footer

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

Multiple navigations need aria-label to distinguish them for screen readers.

Why this matters

Some <nav> elements lack aria-label — screen-reader users hear 'navigation' multiple times with no way to distinguish them.

Learn more ▾

When a page has multiple <nav> regions (primary, footer, breadcrumb), each needs aria-label or aria-labelledby. AT users navigate by landmark; identical 'navigation' announcements force them to enter each one to discover purpose.

Source: WAI-ARIA Authoring Practices

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

D
Alt Text Quality
Action
2 of 29 images have issues
FIX
2 of 29 images have issues
Critical::
2 image(s) missing alt attribute
Images without alt text are invisible to screen readers.
Critical::
2 image-in-link without alt text
An image inside a link with no alt creates an empty link.
Info::
19 decorative image(s) correctly marked
Info::
8 image(s) with good alt text
29 images 8 good alt text 19 decorative 2 missing
IssueCount
missing2 image(s)

Images without alt text are invisible to screen readers.

Why this matters

Each image without alt text is a WCAG 1.1.1 failure — invisible to screen-reader users, lost from Google Image Search.

Learn more ▾

WCAG 2.1 Level A requires text alternatives for non-decorative images. Empty alt='' is fine for decorative; meaningful images need descriptive text. Common fixes: CMS audit + bulk add, build-time linter (alt-text-required ESLint rule), CI gate on Lighthouse a11y score.

Source: WCAG 2.1 SC 1.1.1 / WebAIM Million Report

An image inside a link with no alt creates an empty link.

Why this matters

Image-only links with no alt create empty links — screen-reader users hear 'link' with no destination context.

Learn more ▾

An <a><img></a> with no img alt is the worst-case for accessibility: AT announces the link but can't describe where it goes. Either add alt to the image OR add aria-label to the link.

Source: WCAG 2.1 SC 2.4.4

F
Favicon & Branding
Action
1 icon(s) detected
FIX
1 icon(s) detected
Warning::
No favicon.ico at site root
Some older browsers, bookmark tools, and RSS readers look for /favicon.ico. Add one as a fallback.
Info::
HTML icon links detected
Info::
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'>.
✗ favicon.ico Missing
✓ PNG Icons Present
✗ Apple Touch Missing
✗ SVG Favicon Missing
✗ Manifest Icons Missing
✗ Multiple Sizes Missing
D
Web Manifest
Action
Not found
FIX
Not found
Info::
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.

D
Dark Mode Support
Action
No dark mode signals
FIX
No dark mode signals
Info::
No dark mode signals detected
Consider adding CSS with @media (prefers-color-scheme: dark) and <meta name='color-scheme' content='light dark'>.
Info::
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.

D
Print Stylesheet
Action
No print styles
FIX
No print styles
Info::
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 ✗
F
Navigation UX
Action
1 navigation pattern(s)
FIX
1 navigation pattern(s)
Info::
Search functionality detected
Got: role-search
Info::
8 navigation landmark(s) detected
Breadcrumbs
Search role='search' landmark
Skip Link
Labeled Navigation 8 <nav> element(s)
Back to Top
Hamburger Menu
Sticky Navigation Cannot reliably detect (CSS-based)
2 of 6 testable patterns navigation patterns detected. Limited navigation support. Consider adding breadcrumbs, search, and skip link.
B
404 Error Page
HTTP 404, custom page
REVIEW
HTTP 404, custom page
Info::
Correct 404 status code returned
Got: HTTP 404
Info::
Custom styled 404 page
Info::
Navigation links present on 404 page
Info::
Homepage link present on 404 page
404 Page Quality ✓ Custom 404 Page
Status Code HTTP 404 ✓Page Title 404 Page not found ✓Custom Styling ✓Navigation ✓Homepage Link ✓Search Form ✗
C
Color Contrast (Screenshot)
Action
20 text elements analyzed, 17 fail WCAG AA
REVIEW

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

3 pass 17 fail WCAG AA
h1 ETH Zürich: Übersicht und Aktuelles
1.00:1
#000000
on
#000000
needs 3.0:1 (large text)
32px · bottom of viewport
h2 Direkt zum Inhalt springen
1.00:1
#000000
on
#000000
needs 3.0:1 (large text)
24px · bottom of viewport
h2 ETH-Studierende entwickeln digitale Werk…
1.00:1
#000000
on
#000000
needs 3.0:1 (large text)
24px · bottom of viewport
h2 ETH-Studierende entwickeln digitale Werk…
1.00:1
#000000
on
#000000
needs 3.0:1 (large text)
24px · bottom of viewport
h2 News
1.00:1
#000000
on
#000000
needs 3.0:1 (large text)
24px · bottom of viewport
h2 An der ETH studieren
1.00:1
#000000
on
#000000
needs 3.0:1 (large text)
24px · bottom of viewport
h2 Wussten Sie schon?
1.00:1
#000000
on
#000000
needs 3.0:1 (large text)
24px · bottom of viewport
h2 An der ETH forschen
1.00:1
#000000
on
#000000
needs 3.0:1 (large text)
24px · bottom of viewport
h2 Wissenstransfer in die Gesellschaft
1.00:1
#000000
on
#000000
needs 3.0:1 (large text)
24px · bottom of viewport
h2 An der ETH arbeiten
1.00:1
#000000
on
#000000
needs 3.0:1 (large text)
24px · bottom of viewport
h2 Die ETH erleben
1.00:1
#000000
on
#000000
needs 3.0:1 (large text)
24px · bottom of viewport
h2 Weitere Meldungen aus dem ETH-Universum
1.00:1
#000000
on
#000000
needs 3.0:1 (large text)
24px · bottom of viewport
h2 Footer
1.00:1
#000000
on
#000000
needs 3.0:1 (large text)
24px · bottom of viewport
h2 Treffen Sie Ihre Auswahl
1.00:1
#000000
on
#000000
needs 3.0:1 (large text)
24px · bottom of viewport
h2 Cookie-Einstellungen anpassen
1.00:1
#000000
on
#000000
needs 3.0:1 (large text)
24px · bottom of viewport
h3 Departemente
1.00:1
#000000
on
#000000
needs 3.0:1 (large text)
19px · mid-page
h3 Sprachauswahl
1.00:1
#000000
on
#000000
needs 3.0:1 (large text)
19px · bottom of viewport
Show all checked elements (20)
ElementRatioRequiredFGBGResult
h1 ETH Zürich: Übersi…1.00:13.0:1
#000000
#000000
Fail
h2 Header5.24:13.0:1
#000000
#7F7F7F
Pass
h2 Direkt zum Inhalt sp…1.00:13.0:1
#000000
#000000
Fail
h2 ETH-Studierende entw…1.00:13.0:1
#000000
#000000
Fail
h2 ETH-Studierende entw…1.00:13.0:1
#000000
#000000
Fail
h2 News1.00:13.0:1
#000000
#000000
Fail
h2 An der ETH studieren1.00:13.0:1
#000000
#000000
Fail
h2 Wussten Sie schon?1.00:13.0:1
#000000
#000000
Fail
h2 An der ETH forschen1.00:13.0:1
#000000
#000000
Fail
h2 Wissenstransfer in d…1.00:13.0:1
#000000
#000000
Fail
h2 An der ETH arbeiten1.00:13.0:1
#000000
#000000
Fail
h2 Die ETH erleben1.00:13.0:1
#000000
#000000
Fail
h2 Weitere Meldungen au…1.00:13.0:1
#000000
#000000
Fail
h2 Footer1.00:13.0:1
#000000
#000000
Fail
h2 Treffen Sie Ihre Aus…1.00:13.0:1
#000000
#000000
Fail
h2 Cookie-Einstellungen…1.00:13.0:1
#000000
#000000
Fail
h3 Hauptnavigation5.24:13.0:1
#000000
#7F7F7F
Pass
h3 Suche5.17:13.0:1
#000000
#7E7E7E
Pass
h3 Departemente1.00:13.0:1
#000000
#000000
Fail
h3 Sprachauswahl1.00:13.0:1
#000000
#000000
Fail

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.

A+
Heading Hierarchy
53 headings
PASS
53 headings
Info::
Single H1 present
  • H2 Header
  • H3 Hauptnavigation
  • H3 Suche
  • H3 Departemente
  • H3 Sprachauswahl
  • H2 Direkt zum Inhalt springen
  • H1 ETH Zürich: Übersicht und Aktuelles
  • H2 ETH-Studierende entwickeln digitale Werkzeuge für die UNO
  • H2 ETH-Studierende entwickeln digitale Werkzeuge für die UNO
  • H2 News
  • H3 Wie Städte künftig den Verkehr meistern
  • H3 Proteomik-Pionier Ruedi Aebersold erhält einen der wichtigsten Medizinforschungspreise
  • H3 ETH-Erdbeobachtungszentrum zieht nach Root
  • H3 Die Erde entstand aus lokalen Bausteinen
  • H3 Ranking: ETH Zürich weiterhin weltbeste Hochschule in den Erdwissenschaften
  • H2 An der ETH studieren
  • H3 Studienangebot
  • H3 Studium beginnen
  • H3 Für Studierende
  • H2 Wussten Sie schon?
  • H3 Institutionelle Positionierung
  • H3 Freier Zugriff auf die Bildarchive der WSL
  • H2 An der ETH forschen
  • H3 Doktoratsstelle finden
  • H3 Postdocs an der ETH Zürich
  • H3 Ausgeschriebene Professuren
  • H2 Wissenstransfer in die Gesellschaft
  • H3 Die Albert Einstein School of Public Policy an der ETH Zürich
  • H3 Ein Trojanisches Pferd für künstliche Aminosäuren
  • H3 ETH Exploration Lab
  • H2 An der ETH arbeiten
  • H2 Die ETH erleben
  • H3 Auf dem Campus
  • H3 Besuchen Sie uns
  • H2 Weitere Meldungen aus dem ETH-Universum
  • H3 Jahresbericht der ETH Foundation
  • H3 Early Career Prize der SIAM für Nora Lüthen
  • H3 Nathan Lacroix gewinnt den DQI-Preis für die beste Doktorarbeit bei der APS Global Physics Summit 2026
  • H2 Footer
  • H3 Empfohlene Links
  • H3 Suche
  • H3 Folgen Sie uns
  • H3 Services
  • H3 Departemente
  • H3 Inhaltsverzeichnis und Rechtliches
  • H2 Treffen Sie Ihre Auswahl
  • H2 Cookie-Einstellungen anpassen
  • H3 Cookie-Präferenzen verwalten
  • H4 Unbedingt erforderliche Cookies
  • H4 Funktionale Cookies
  • H4 Leistungs-Cookies
  • H4 Cookies für Marketingzwecke
  • H3 Cookie-Liste
A+
Form Accessibility
All 12 controls labeled
PASS
All 12 controls labeled
Info::
12 control(s) properly labeled
12 controls
12 labeled
0 placeholder only
0 unlabeled
ControlTypeLabelMethod
#lang-selectorselectdefor/id
#departement-selectorselectWählen Sie ein Departementfor/id
#lang-selector-longselectdefor/id
#searchinputtextSuchbegriff oder Personfor/id
#ot-group-id-C0003checkboxFunktionale Cookiesfor/id
#ot-group-id-C0002checkboxLeistungs-Cookiesfor/id
#ot-group-id-C0004checkboxCookies für Marketingzweckefor/id
#vendor-search-handlertextSuche in Cookie-Listenaria-label
#chkbox-idcheckboxcheckbox labelfor/id
#select-all-hosts-groups-handlercheckboxcheckbox labelfor/id
#select-all-vendor-groups-handlercheckboxcheckbox labelfor/id
#select-all-vendor-leg-handlercheckboxcheckbox labelfor/id
A
Lighthouse Accessibility Audits
Score 92/100 — 3 failing, 27 passed
PASS
92

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.

Names and labels

Informative elements should aim for short, descriptive alternate text. Decorative elements can be ignored with an empty alt attribute. Learn more about the `alt` attribute.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
a > div.HomeHero > figure.HomeHero__media > img a > div.HomeHero > figure.HomeHero__media > img

Link text (and alternate text for images, when used as links) that is discernible, unique, and focusable improves the navigation experience for screen reader users. Learn how to make links accessible.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
div#navTopRoot > div.header__navbar > div.header__search-link-container > a.header__search-link div#navTopRoot > div.header__navbar > div.header__search-link-container > a.header__search-link

These are opportunities to improve the semantics of the controls in your application. This may enhance the experience for users of assistive technology, like a screen reader.

Visible text labels that do not match the accessible name can result in a confusing experience for screen reader users. Learn more about accessible names.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
ETH-Studierende entwickeln digitale Werkzeuge für die UNO chevron_right Den Art… div.homehero > div.homehero__wrapper > div#homeHero > a
○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
●`[role]` values are valid
●`[aria-*]` attributes have valid values
●`[aria-*]` attributes are valid and not misspelled
●Buttons have an accessible name
●Form elements have associated labels
●`[user-scalable="no"]` is not used in the `<meta name="viewport">` element and the `[maximum-scale]` attribute is not less than 5.
●Select elements have associated label elements.
●`[accesskey]` values are unique
●ARIA attributes are used as specified for the element's role
●Elements with `role="dialog"` or `role="alertdialog"` have accessible names.
●`[aria-hidden="true"]` elements do not contain focusable descendents
●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 are distinguishable without relying on color.
●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
●Touch targets have sufficient size and spacing.
●Heading elements appear in a sequentially-descending order
●Document has a main landmark.
●Deprecated ARIA roles were not used
○`button`, `link`, and `menuitem` elements have accessible names
○ARIA input fields have accessible names
○ARIA `meter` elements have accessible names
○ARIA `progressbar` elements have accessible names
○Elements with an ARIA `[role]` that require children to contain a specific `[role]` have all required children.
○`[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
○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
○The document does not use `<meta http-equiv="refresh">`
○`<object>` elements have alternate text
○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.
○Identical links have the same purpose.
○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.

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