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Accessibility

· 13 checks — Landmarks, headings, alt text, forms, and link quality rolled into one auditable list.
SCORE
61
GRADE
D
FIX
5
REVIEW
3
PASS
5
INFO
0
Checks
13
5 PASS 3 REVIEW 5 FIX
D
Web Manifest
Action
Valid manifest
FIX
Valid manifest
Info::
Name present: TU Delft
Info::
192x192 icon present
PWA Install Criteria Not Installable
Name TU Delft ✓192×192 icon ✓512×512 icon ✗Start URL ✗Display Mode ✗
Name TU Delft Icons 6 icon(s)
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: #ffffff
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
No navigation patterns
FIX
No navigation patterns
Info::
4 navigation landmark(s) detected
Info::
No breadcrumbs, search, or skip link detected
These navigation aids help users orient themselves and find content efficiently, especially on large sites.
Breadcrumbs
Search
Skip Link
Labeled Navigation 4 <nav> element(s)
Back to Top
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.
C
Form Accessibility
Action
4 of 10 controls have issues
REVIEW
4 of 10 controls have issues
Critical::
4 control(s) without accessible label
Form controls need a <label>, aria-label, or aria-labelledby for screen readers.
Got: <input type="checkbox" id="CybotCookiebotDialogBodyLevelButtonNecessaryInline">; <input type="checkbox" id="CybotCookiebotDialogBodyLevelButtonPreferencesInline">; <input type="checkbox" id="CybotCookiebotDialogBodyLevelButtonStatisticsInline">; <input type="checkbox" id="CybotCookiebotDialogBodyLevelButtonMarketingInline">
Info::
6 control(s) properly labeled
10 controls
6 labeled
0 placeholder only
4 unlabeled
ControlTypeLabelMethod
#CybotCookiebotDialogBodyLevelButtonNecessarycheckboxNoodzakelijkfor/id
#CybotCookiebotDialogBodyLevelButtonPreferencescheckboxVoorkeurenfor/id
#CybotCookiebotDialogBodyLevelButtonStatisticscheckboxStatistiekenfor/id
#CybotCookiebotDialogBodyLevelButtonMarketingcheckboxMarketingcookies voor externe inhoudfor/id
#CybotCookiebotDialogBodyContentCheckboxPersonalInformationcheckboxVerkoop of deel mijn persoonsgegevens nietfor/id
#headerSearchForm-inputsearchZoekenaria-label
#CybotCookiebotDialogBodyLevelButtonStatisticsInlinecheckbox(none)none
#CybotCookiebotDialogBodyLevelButtonMarketingInlinecheckbox(none)none
#CybotCookiebotDialogBodyLevelButtonNecessaryInlinecheckbox(none)none
#CybotCookiebotDialogBodyLevelButtonPreferencesInlinecheckbox(none)none

Form controls need a <label>, aria-label, or aria-labelledby for screen readers.

<input type="checkbox" id="CybotCookiebotDialogBodyLevelButtonNecessaryInline">; <input type="checkbox" id="CybotCookiebotDialogBodyLevelButtonPreferencesInline">; <input type="checkbox" id="CybotCookiebotDialogBodyLevelButtonStatisticsInline">; <input type="checkbox" id="CybotCookiebotDialogBodyLevelButtonMarketingInline">

Why this matters

Form controls without labels — assistive tech announces 'edit text' with no context; users can't complete forms.

Source: WCAG 2.1 SC 3.3.2

C
Favicon & Branding
Action
20 icon(s) detected
REVIEW
20 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::
Apple touch icon present
Info::
Multiple icon sizes detected
✗ favicon.ico Missing
✓ PNG Icons Present
✓ Apple Touch Present
✗ SVG Favicon Missing
✓ Manifest Icons Present
✓ Multiple Sizes Present
C
Color Contrast (Screenshot)
Action
20 text elements analyzed, 20 fail WCAG AA
REVIEW

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

0 pass 20 fail WCAG AA
h1 Smeltend ijs, stijgende bodem
1.26:1
#000000
on
#1E1E1E
needs 3.0:1 (large text)
32px · bottom of viewport
h2 Wil je onze campus bezoeken?
1.26:1
#000000
on
#1E1E1E
needs 3.0:1 (large text)
24px · bottom of viewport
h2 Impact for a better society
1.26:1
#000000
on
#1E1E1E
needs 3.0:1 (large text)
24px · bottom of viewport
h2 Carousel Impact for a better society
1.26:1
#000000
on
#1E1E1E
needs 3.0:1 (large text)
24px · bottom of viewport
h2 Kunstmatige vruchten helpen ringstaartma…
1.26:1
#000000
on
#1E1E1E
needs 3.0:1 (large text)
24px · bottom of viewport
h2 Een nieuw model voor lithium-ion batteri…
1.26:1
#000000
on
#1E1E1E
needs 3.0:1 (large text)
24px · bottom of viewport
h2 Hoe AI en muziek de dementiezorg kunnen …
1.26:1
#000000
on
#1E1E1E
needs 3.0:1 (large text)
24px · bottom of viewport
h2 Wat als fouten vermijden belangrijker wo…
1.26:1
#000000
on
#1E1E1E
needs 3.0:1 (large text)
24px · bottom of viewport
h2 Kunstmatige vruchten helpen ringstaartma…
1.26:1
#000000
on
#1E1E1E
needs 3.0:1 (large text)
24px · bottom of viewport
h2 Een nieuw model voor lithium-ion batteri…
1.26:1
#000000
on
#1E1E1E
needs 3.0:1 (large text)
24px · bottom of viewport
h2 Hoe AI en muziek de dementiezorg kunnen …
1.26:1
#000000
on
#1E1E1E
needs 3.0:1 (large text)
24px · bottom of viewport
h2 Wat als fouten vermijden belangrijker wo…
1.26:1
#000000
on
#1E1E1E
needs 3.0:1 (large text)
24px · bottom of viewport
h2 Kunstmatige vruchten helpen ringstaartma…
1.26:1
#000000
on
#1E1E1E
needs 3.0:1 (large text)
24px · bottom of viewport
h2 Een nieuw model voor lithium-ion batteri…
1.26:1
#000000
on
#1E1E1E
needs 3.0:1 (large text)
24px · bottom of viewport
h2 Nieuws
1.26:1
#000000
on
#1E1E1E
needs 3.0:1 (large text)
24px · bottom of viewport
h2 Nieuws
1.26:1
#000000
on
#1E1E1E
needs 3.0:1 (large text)
24px · bottom of viewport
h2 Evenementen
1.26:1
#000000
on
#1E1E1E
needs 3.0:1 (large text)
24px · bottom of viewport
h2 Technische Universiteit Delft
1.26:1
#000000
on
#1E1E1E
needs 3.0:1 (large text)
24px · bottom of viewport
h3 Opleidingen
1.26:1
#000000
on
#1E1E1E
needs 3.0:1 (large text)
19px · bottom of viewport
h3 TU Delft opent nieuw onderzoekscentrum i…
1.26:1
#000000
on
#1E1E1E
needs 3.0:1 (large text)
19px · bottom of viewport
Show all checked elements (20)
ElementRatioRequiredFGBGResult
h1 Smeltend ijs, stijge…1.26:13.0:1
#000000
#1E1E1E
Fail
h2 Wil je onze campus b…1.26:13.0:1
#000000
#1E1E1E
Fail
h2 Impact for a better …1.26:13.0:1
#000000
#1E1E1E
Fail
h2 Carousel Impact for …1.26:13.0:1
#000000
#1E1E1E
Fail
h2 Kunstmatige vruchten…1.26:13.0:1
#000000
#1E1E1E
Fail
h2 Een nieuw model voor…1.26:13.0:1
#000000
#1E1E1E
Fail
h2 Hoe AI en muziek de …1.26:13.0:1
#000000
#1E1E1E
Fail
h2 Wat als fouten vermi…1.26:13.0:1
#000000
#1E1E1E
Fail
h2 Kunstmatige vruchten…1.26:13.0:1
#000000
#1E1E1E
Fail
h2 Een nieuw model voor…1.26:13.0:1
#000000
#1E1E1E
Fail
h2 Hoe AI en muziek de …1.26:13.0:1
#000000
#1E1E1E
Fail
h2 Wat als fouten vermi…1.26:13.0:1
#000000
#1E1E1E
Fail
h2 Kunstmatige vruchten…1.26:13.0:1
#000000
#1E1E1E
Fail
h2 Een nieuw model voor…1.26:13.0:1
#000000
#1E1E1E
Fail
h2 Nieuws1.26:13.0:1
#000000
#1E1E1E
Fail
h2 Nieuws1.26:13.0:1
#000000
#1E1E1E
Fail
h2 Evenementen1.26:13.0:1
#000000
#1E1E1E
Fail
h2 Technische Universit…1.26:13.0:1
#000000
#1E1E1E
Fail
h3 Opleidingen1.26:13.0:1
#000000
#1E1E1E
Fail
h3 TU Delft opent nieuw…1.26:13.0:1
#000000
#1E1E1E
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
Landmark Structure
9 landmarks
PASS
9 landmarks
Info::
<main> landmark present
Info::
4 <nav> landmark(s) found
Info::
All <nav> elements are properly labeled
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.
Page Structure — as a screen reader sees it
BANNER header NAV "Skiplinks" MAIN CONTENTINFO footer

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

A+
Heading Hierarchy
39 headings
PASS
39 headings
Info::
Single H1 present
  • H1 Smeltend ijs, stijgende bodem
  • H2 Wil je onze campus bezoeken?
  • H3 Opleidingen
  • H2 Impact for a better society
  • H2 Carousel Impact for a better society
  • H2 Kunstmatige vruchten helpen ringstaartmaki’s voeden zoals in het wild
  • H2 Een nieuw model voor lithium-ion batterijbeheer
  • H2 Hoe AI en muziek de dementiezorg kunnen transformeren
  • H2 Wat als fouten vermijden belangrijker wordt dan experimenteren?
  • H2 Kunstmatige vruchten helpen ringstaartmaki’s voeden zoals in het wild
  • H2 Een nieuw model voor lithium-ion batterijbeheer
  • H2 Hoe AI en muziek de dementiezorg kunnen transformeren
  • H2 Wat als fouten vermijden belangrijker wordt dan experimenteren?
  • H2 Kunstmatige vruchten helpen ringstaartmaki’s voeden zoals in het wild
  • H2 Een nieuw model voor lithium-ion batterijbeheer
  • H2 Nieuws
  • H2 Nieuws
  • H3 TU Delft opent nieuw onderzoekscentrum in Den Haag over klimaatveiligheid
  • H3 Reactie TU Delft op herstelonderzoek sociale veiligheid door Onderwijsinspectie
  • H3 Drie toegewezen TU Delft projecten ontvangen KIC-call Klimaatbestendige gebouwen met de natuur als inspiratie
  • H3 Bouwen op de maan
  • H3 TU Delft brengt klimaatrisico’s voor het Nederlandse energiesysteem in kaart
  • H3 Pas op, glad! Studenten werken aan robots die waarschuwen voor gevaarlijk wegdek
  • H3 TU Delft: twee doorbraken in klimaat en energie bekroond
  • H3 Het verkeer in beweging houden met nieuwe zelflerende verkeersmodellen
  • H3 Nieuwe onderwijs-cleanroom helpt tekort van duizenden chiptechnici oplossen
  • H3 Bacteriën verraden zich via unieke geluiden: doorbraak voor snelle diagnostiek
  • H2 Evenementen
  • H3 25 april: Golf Clinic
  • H3 29 april: Mental Well-being Workshop - Good Conversations
  • H3 2 mei: Birdwatching
  • H3 8 mei: Maker Faire Delft
  • H3 9 mei: SurvivalStrijd 2026
  • H3 11 mei: Critical Mass | The Brain
  • H3 12 mei: Meet & Eat | Going Beyond Grades! | Prem Sundaramoorthy & Ines Uriol Balbin
  • H3 13 mei: Rooftop Writing Huddle | Sunrise Euphoria
  • H3 t/m 26 mei: Expositie: Vogels in het groen
  • H3 28 mei: Outdoor Cinema: One Flew Over the Cuckoo's Nest
  • H2 Technische Universiteit Delft
A
Alt Text Quality
1 of 68 images have issues
PASS
1 of 68 images have issues
Warning::
1 image(s) with generic alt text
Info::
2 image(s) with alt text over 125 characters
Info::
9 decorative image(s) correctly marked
Info::
56 image(s) with good alt text
68 images 56 good alt text 9 decorative 1 generic
IssueCount
generic1 image(s)
too long2 image(s)
A
404 Error Page
HTTP 404, custom page
PASS
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
Info::
Search form present on 404 page
404 Page Quality ✓ Custom 404 Page
Status Code HTTP 404 ✓Page Title TU Delft homepage ✓Custom Styling ✓Navigation ✓Homepage Link ✓Search Form ✓
A
Lighthouse Accessibility Audits
Score 93/100 — 2 failing, 26 passed
PASS
93

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. Learn how to provide sufficient color contrast.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
Wil je onze campus bezoeken? div.dynamicHeader-slideBlocks > div.dynamicHeader-block--798 > div.dynamicHeader-blockText > h2.h3
Onze maatschappelijke uitdagingen div.container > div#c989665 > div#c988580 > a.btn
Meer nieuws div.sm-12 > div#c989673 > div#c1549740 > a.btn
25 april: Golf Clinic a.card > div.card__contentWrapper > section.card__content > h3#heading-1847588
Meer evenementen div.sm-12 > div#c989674 > div#c988544 > a.btn

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
div.row > div.content-slider > div.content-slider__bullet-wrap > button.content-slider__bullet div.row > div.content-slider > div.content-slider__bullet-wrap > button.content-slider__bullet
div.row > div.content-slider > div.content-slider__bullet-wrap > button.content-slider__bullet div.row > div.content-slider > div.content-slider__bullet-wrap > button.content-slider__bullet
div.row > div.content-slider > div.content-slider__bullet-wrap > button.content-slider__bullet div.row > div.content-slider > div.content-slider__bullet-wrap > button.content-slider__bullet
div.row > div.content-slider > div.content-slider__bullet-wrap > button.content-slider__bullet div.row > div.content-slider > div.content-slider__bullet-wrap > button.content-slider__bullet
div.row > div.content-slider > div.content-slider__bullet-wrap > button.content-slider__bullet div.row > div.content-slider > div.content-slider__bullet-wrap > button.content-slider__bullet
div.row > div.content-slider > div.content-slider__bullet-wrap > button.content-slider__bullet div.row > div.content-slider > div.content-slider__bullet-wrap > button.content-slider__bullet
div.row > div.content-slider > div.content-slider__bullet-wrap > button.content-slider__bullet div.row > div.content-slider > div.content-slider__bullet-wrap > button.content-slider__bullet
div.row > div.content-slider > div.content-slider__bullet-wrap > button.content-slider__bullet div.row > div.content-slider > div.content-slider__bullet-wrap > button.content-slider__bullet
div.row > div.content-slider > div.content-slider__bullet-wrap > button.content-slider__bullet div.row > div.content-slider > div.content-slider__bullet-wrap > button.content-slider__bullet
div.row > div.content-slider > div.content-slider__bullet-wrap > button.content-slider__bullet div.row > div.content-slider > div.content-slider__bullet-wrap > button.content-slider__bullet

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
●`[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
●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
●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
●`[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
○`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
○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.
○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.

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