Accessibility

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

SCORE

GRADE

FIX

REVIEW

PASS

INFO

Checks

7 PASS 3 REVIEW 3 FIX

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

5 navigation landmark(s) detected

Hamburger menu detected (responsive design)

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 5 <nav> element(s)

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.

Landmark Structure

9 landmarks

REVIEW

9 landmarks

<main> landmark present

5 <nav> landmark(s) found

2 of 5 <nav> elements are unlabeled

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

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

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

404 Error Page

HTTP 404, custom page

REVIEW

HTTP 404, custom page

Correct 404 status code returned

Got: HTTP 404

Custom styled 404 page

Navigation links present on 404 page

404 Page Quality ✓ Custom 404 Page

Status Code HTTP 404 ✓Page Title 404 - Humboldt-Universität zu Berlin ✓Custom Styling ✓Navigation ✓Homepage Link ✗Search Form ✗

Web Manifest

Valid manifest

REVIEW

Valid manifest

Name present: HU Berlin

192x192 icon present

512x512 icon present

Display mode: standalone

PWA Install Criteria Not Installable

Name HU Berlin ✓192×192 icon ✓512×512 icon ✓Start URL ✗Display Mode standalone ✓

Name HU Berlin Display Mode standalone Theme Color #ffffff Background Color #ffffff Icons 2 icon(s)

A+

Heading Hierarchy

66 headings

PASS

66 headings

Single H1 present

H4 Schnelleinstiege
H4 Schnelleinstiege
H4 Schnelleinstiege
H4 Schnelleinstiege
H4 Schnelleinstiege
H4 Schnelleinstiege
H4 Schnelleinstiege
H4 Schnelleinstiege
H4 Schnelleinstiege
H4 Schnelleinstiege
H4 Schnelleinstiege
H4 Schnelleinstiege
H4 Schnelleinstiege
H4 Schnelleinstiege
H4 Schnelleinstiege
H4 Schnelleinstiege
H4 Schnelleinstiege
H4 Schnelleinstiege
H4 Schnelleinstiege
H4 Schnelleinstiege
H4 Schnelleinstiege
H4 Schnelleinstiege
H4 Schnelleinstiege
H4 Schnelleinstiege
H4 Schnelleinstiege
H4 Schnelleinstiege
H4 Schnelleinstiege
H4 Schnelleinstiege
H4 Schnelleinstiege
H4 Schnelleinstiege
H4 Schnelleinstiege
H4 Schnelleinstiege
H4 Schnelleinstiege
H4 Schnelleinstiege
H4 Schnelleinstiege
H4 Schnelleinstiege
H4 Schnelleinstiege
H4 Schnelleinstiege
H4 Sprache wechseln
H4 Angebote & Dienste
H4 Schnelleinstiege
H1 Wir sind Humboldt
H2 Ihr Weg an die Humboldt-Universität
H2 Aktuelle Nachrichten
H3 Internationales Parlaments-Stipendium (IPS): Bundestag verlängert Vertrag mit HU
H3 Volkswagenstiftung fördert zwei Projekte an der Humboldt-Universität
H3 Infolge politischer Unruhen leiden junge Menschen in Afrika vermehrt unter häuslicher und anderer Gewalt
H3 Die Humboldt-Universität zu Berlin wählt zwei neue Vizepräsident*innen
H3 Das Präsidium der HU ruft zu Solidarität mit der Universität Belgrad auf
H2 Aktuelle Veranstaltungen
H3 Sitzung des Konzils der Humboldt-Universität zu Berlin
H3 Sitzung des Akademischen Senats der Humboldt-Universität zu Berlin
H3 Integrated Circuits, Post-Extractive Futures: A Film Evening with Su Yu Hsin
H3 Train-the-Trainer: Research Data Management
H2 FAQ zu Hochschulvertrag und notwendigen Sparmaßnahmen
H3 Wir sind exzellent
H3 Wir sind international
H2 Studium an der HU
H2 Studium an der HU
H2 Forschung & Lehre
H2 Forschung & Lehre
H2 Open Humboldt
H2 Open Humboldt
H2 Unsere Universität
H2 Unsere Universität
H2 Open Humboldt: Der Newsletter der HU

A+

Alt Text Quality

All 14 images OK

PASS

All 14 images OK

1 decorative image(s) correctly marked

13 image(s) with good alt text

14 images 13 good alt text 1 decorative

All images have appropriate alt text.

A+

Form Accessibility

All 3 controls labeled

PASS

All 3 controls labeled

3 control(s) properly labeled

3 controls

3 labeled

0 placeholder only

0 unlabeled

Control	Type	Label	Method
#tx-solr-q-h	text	Suche	aria-label
#newsletter-email-27081	email	E-Mail-Adresse	for/id
#newsletter-privacy-27081	checkbox	Ich bin damit einverstanden, dass meine Daten für den Empfang des Newslettersverarbeitet werden. Weitere Informationen erhalten Sie in der Datenschutzerklärung der Humboldt-Universität zu Berlin. Die Anmeldung ist erst abgeschlossen, nachdem Sie den Bestätigungslink, welchen Sie per E-Mail erhalten, aktiviert haben.	for/id

Link & Button Quality

362 links, 43 buttons — all OK

PASS

362 links, 43 buttons — all OK

10 link(s) open in new tab without warning

Add '(opens in new tab)' to link text or aria-label.

Got: /studium/vor-dem-studium/ueberblick; https://intranet.hu-berlin.de/; https://www.ub.hu-berlin.de/de; https://humboldtstore.de/; https://www.facebook.com/humboldtuni; https://bsky.app/profile/humboldtuni.bsky.social; https://www.instagram.com/humboldt.uni/; https://www.youtube.com/user/humboldtuniberlin?blend=1&ob=5; https://www.linkedin.com/school/humboldt-university-berlin; https://wisskomm.social/@HumboldtUni

352 link(s) with descriptive text

362 links

0 empty

0 generic text

10 new tab

0 empty buttons

Element	Text	Issue	Suggested Fix
/studium/vor-dem-studium/ueberblick	Studieninteressierte	new tab	Add '(opens in new tab)' to text
https://intranet.hu-berlin.de/	Mitarbeitende	new tab	Add '(opens in new tab)' to text
https://www.ub.hu-berlin.de/de	Universitätsbibliothek	new tab	Add '(opens in new tab)' to text
https://humboldtstore.de/	Humboldt Store	new tab	Add '(opens in new tab)' to text
https://www.facebook.com/humboldtuni	Facebook	new tab	Add '(opens in new tab)' to text
https://bsky.app/profile/humboldtuni.bsk…	Bluesky	new tab	Add '(opens in new tab)' to text
https://www.instagram.com/humboldt.uni/	Instagram	new tab	Add '(opens in new tab)' to text
https://www.youtube.com/user/humboldtuni…	YouTube	new tab	Add '(opens in new tab)' to text
https://www.linkedin.com/school/humboldt…	LinkedIn	new tab	Add '(opens in new tab)' to text
https://wisskomm.social/@HumboldtUni	Mastodon	new tab	Add '(opens in new tab)' to text

395 links and buttons have descriptive text

Add '(opens in new tab)' to link text or aria-label.

/studium/vor-dem-studium/ueberblick; https://intranet.hu-berlin.de/; https://www.ub.hu-berlin.de/de; https://humboldtstore.de/; https://www.facebook.com/humboldtuni; https://bsky.app/profile/humboldtuni.bsky.social; https://www.instagram.com/humboldt.uni/; https://www.youtube.com/user/humboldtuniberlin?blend=1&ob=5; https://www.linkedin.com/school/humboldt-university-berlin; https://wisskomm.social/@HumboldtUni

Why this matters

Links with target="_blank" without rel="noopener" leak the originating page's window context — security and UX issue.

Learn more ▾

Without rel="noopener", the new tab can navigate the original tab via window.opener (tab-nabbing attack). Modern browsers default to noopener for target=_blank but only since recent versions. Always set rel="noopener noreferrer" explicitly.

Source: MDN target / OWASP

Favicon & Branding

7 icon(s) detected

PASS

7 icon(s) detected

favicon.ico present at site root

HTML icon links detected

Apple touch icon present

SVG favicon detected — scales perfectly to any size

Multiple icon sizes detected

✓ favicon.ico Present

✓ PNG Icons Present

✓ Apple Touch Present

✓ SVG Favicon Present

✓ Manifest Icons Present

✓ Multiple Sizes Present

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 Wir sind Humboldt	20.06:1	3.0:1	#000000	#FAFAF5	Pass
h2 Ihr Weg an die Humbo…	20.06:1	3.0:1	#000000	#FAFAF5	Pass
h2 Aktuelle Nachrichten	20.06:1	3.0:1	#000000	#FAFAF5	Pass
h2 Aktuelle Veranstaltu…	20.06:1	3.0:1	#000000	#FAFAF5	Pass
h2 FAQ zu Hochschulvert…	20.06:1	3.0:1	#000000	#FAFAF5	Pass
h2 Studium an der HU	20.06:1	3.0:1	#000000	#FAFAF5	Pass
h2 Studium an der HU	20.06:1	3.0:1	#000000	#FAFAF5	Pass
h2 Forschung & Lehre	20.06:1	3.0:1	#000000	#FAFAF5	Pass
h2 Forschung & Lehre	20.06:1	3.0:1	#000000	#FAFAF5	Pass
h2 Open Humboldt	20.06:1	3.0:1	#000000	#FAFAF5	Pass
h2 Open Humboldt	20.06:1	3.0:1	#000000	#FAFAF5	Pass
h2 Unsere Universität	20.06:1	3.0:1	#000000	#FAFAF5	Pass
h2 Unsere Universität	20.06:1	3.0:1	#000000	#FAFAF5	Pass
h2 Open Humboldt: Der N…	20.06:1	3.0:1	#000000	#FAFAF5	Pass
h3 Sitzung des Konzils …	20.06:1	3.0:1	#000000	#FAFAF5	Pass
h3 Sitzung des Akademis…	20.06:1	3.0:1	#000000	#FAFAF5	Pass
h3 Integrated Circuits,…	20.06:1	3.0:1	#000000	#FAFAF5	Pass
h3 Train-the-Trainer: R…	20.06:1	3.0:1	#000000	#FAFAF5	Pass
h3 Wir sind exzellent	20.06:1	3.0:1	#000000	#FAFAF5	Pass
h3 Wir sind internation…	20.06:1	3.0:1	#000000	#FAFAF5	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.

A+

Lighthouse Accessibility Audits

Score 100/100 — 0 failing, 26 passed

PASS

100

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.

○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

●Image elements have `[alt]` attributes

●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.

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

●`[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.

●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

●Touch targets have sufficient size and spacing.

●Heading elements appear in a sequentially-descending order

●Skip links are focusable.

●Document has a main landmark.

●Deprecated ARIA roles were not used

○`[accesskey]` values are unique

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

○Elements with `role="dialog"` or `role="alertdialog"` 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

○Select elements have associated label elements.

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

○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.

○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.