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Accessibility

· 13 checks — Landmarks, headings, alt text, forms, and link quality rolled into one auditable list.
SCORE
64
GRADE
D
FIX
5
REVIEW
2
PASS
6
INFO
0
Checks
13
6 PASS 2 REVIEW 5 FIX
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
Theme color only
FIX
Theme color only
Info::
Theme-color present but no dark variant
A theme-color is set but no dark-specific variant was found. The browser toolbar may not adapt for dark mode users.
Got: #000000
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 ModePartial Dark Mode
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::
Skip navigation link detected
Info::
4 navigation landmark(s) detected
Breadcrumbs
Search
Skip Link Skip link detected
Labeled Navigation 4 <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
404 Page Quality ✓ Custom 404 Page
Status Code HTTP 404 ✓Page Title Error 404 Seite nicht vorhanden ✓Custom Styling ✓Navigation ✓Homepage Link ✗Search Form ✗
B
Favicon & Branding
9 icon(s) detected
REVIEW
9 icon(s) detected
Info::
favicon.ico present at site root
Info::
HTML icon links detected
Info::
Apple touch icon present
Info::
Multiple icon sizes detected
✓ favicon.ico Present
✓ PNG Icons Present
✓ Apple Touch Present
✗ SVG Favicon Missing
✗ Manifest Icons Missing
✓ Multiple Sizes Present
A
Landmark Structure
8 landmarks
PASS
8 landmarks
Info::
<main> landmark present
Info::
4 <nav> landmark(s) found
Warning::
2 of 4 <nav> elements are unlabeled
Multiple navigations need aria-label to distinguish them for screen readers.
Info::
Skip navigation link present
Page Structure — as a screen reader sees it
BANNER header NAV MAIN ASIDE CONTENTINFO footer

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

A
Heading Hierarchy
33 headings
PASS
33 headings
Warning::
Multiple H1 headings (4 found)
A page should have only one H1. Multiple H1s dilute the document outline.
  • H2 Accessibility links
  • H1 Welcome to Heidelberg University
  • H1 Nobel Prize Winners Heidelberg Nobel Prize Winners duplicate H1
  • H1 International Ruperto Carola international duplicate H1
  • H1 Donations & Endowments Your Commitment To Heidelberg University duplicate H1
  • H2 Against Exclusion and Discrimination
  • H2 Current Information
  • H3 Universität Heidelberg: audiMAX Lecture Hall and Study Center to Be Officially Opened
  • H3 Award Goes to Outstanding Heidelberg Master’s Student
  • H2 University
  • H2 Research
  • H2 Study
  • H2 Transfer
  • H2 Excellence Strategy
  • H2 Event Tips
  • H3 Marsilius kontrovers: Autonomie in unruhigen Zeiten. Wie schützen wir die Wissenschaftsfreiheit?
  • H3 The Lancet Countdown on Health and Climate Change in Europe 2026 – Report Presentation and National Success Stories
  • H3 Home and Belonging: Everything Everywhere All at Once (2022, OmU)
  • H3 Vernissage: Druck mir ’ne Handschrift! Facsimilia des Instituts für Europäische Kunstgeschichte
  • H2 Links
  • H3 Ruperto Carola
  • H3 Unispiegel
  • H3 Annual Report (DE)
  • H2 Footer
  • H3 Main menu
  • H3 Information For
  • H3 Quick Links
  • H3 Contact
  • H3 Footer Memberships
  • H3 Languages
  • H3 Footer Legal
  • H3 Footer Social Media
  • H3 Footer Legal

A page should have only one H1. Multiple H1s dilute the document outline.

Why this matters

Multiple H1s blur the page's primary topic — screen-reader users and Google both prefer one H1.

Learn more ▾

HTML5's outline algorithm technically allows multiple H1s within sectioning content, but no browser implements it. In practice: one H1 per page. Use H2-H6 for subsections.

Source: WCAG 2.4.6 / Google Search Central

A+
Alt Text Quality
All 22 images OK
PASS
All 22 images OK
Info::
21 decorative image(s) correctly marked
Info::
1 image(s) with good alt text
22 images 1 good alt text 21 decorative
All images have appropriate alt text.
A+
Form Accessibility
No form controls
PASS
No form controls
Info::
No form controls on this page
No form controls found.
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)
ElementRatioRequiredFGBGResult
h2 Accessibility links8.79:13.0:1
#000000
#A6A8A8
Pass
h2 Against Exclusion an…21.00:13.0:1
#000000
#FFFFFF
Pass
h2 Current Information21.00:13.0:1
#000000
#FFFFFF
Pass
h2 University21.00:13.0:1
#000000
#FFFFFF
Pass
h2 Research21.00:13.0:1
#000000
#FFFFFF
Pass
h2 Study21.00:13.0:1
#000000
#FFFFFF
Pass
h2 Transfer21.00:13.0:1
#000000
#FFFFFF
Pass
h2 Excellence Strategy21.00:13.0:1
#000000
#FFFFFF
Pass
h2 Event Tips21.00:13.0:1
#000000
#FFFFFF
Pass
h2 Links21.00:13.0:1
#000000
#FFFFFF
Pass
h2 Footer21.00:13.0:1
#000000
#FFFFFF
Pass
h3 Universität Heidelb…21.00:13.0:1
#000000
#FFFFFF
Pass
h3 Award Goes to Outsta…21.00:13.0:1
#000000
#FFFFFF
Pass
h3 Marsilius kontrovers…21.00:13.0:1
#000000
#FFFFFF
Pass
h3 The Lancet Countdown…21.00:13.0:1
#000000
#FFFFFF
Pass
h3 Home and Belonging: …21.00:13.0:1
#000000
#FFFFFF
Pass
h3 Vernissage: Druck mi…21.00:13.0:1
#000000
#FFFFFF
Pass
h3 Ruperto Carola21.00:13.0:1
#000000
#FFFFFF
Pass
h3 Unispiegel21.00:13.0:1
#000000
#FFFFFF
Pass
h3 Annual Report (DE)21.00:13.0:1
#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.

A+
Lighthouse Accessibility Audits
Score 100/100 — 1 failing, 27 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.

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
© istock/Jasmina007 div.Wrapper_h63FG > ul.List_ms4Ic > li.ListItem_Vzq4l > a
stock.adobe.com / Konstantin Kolosov div.Wrapper_h63FG > ul.List_ms4Ic > li.ListItem_Vzq4l > a
© pixabay.com / Wolfgang Hasselmann div.Wrapper_h63FG > ul.List_ms4Ic > li.ListItem_Vzq4l > a
© pexels.com / Nicolette Villavicencio div.Wrapper_h63FG > ul.List_ms4Ic > li.ListItem_Vzq4l > a
© Fredrik Sandberg/TT div.Wrapper_h63FG > ul.List_ms4Ic > li.ListItem_Vzq4l > 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
●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.
●`button`, `link`, and `menuitem` elements have accessible names
●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
●No element has a `[tabindex]` value greater than 0
●Touch targets have sufficient size and spacing.
●`[lang]` attributes have a valid value
●Heading elements appear in a sequentially-descending order
●Document has a main landmark.
●Deprecated ARIA roles were not used
○`[accesskey]` values are unique
○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
○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.
○`<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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